Chronography of Chemistry and the Elements

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Elements, discovery of; see Appendix 1 (this focuses on the date the pure element was first isolated)

 

5 November 2015, Pierre Maurice Gy, French chemist, died (born 25 July 1924).

8 January 1997, Melvin Calvin, US chemist and Nobel prize winner, died.

7 November 1991, The first report on carbon nanotubes was reported in Nature.

29 May 1987, John Howard Northrop, chemist and Nobel prize winner, died.

1985, Buckminsterfullerene, a stable molecule comprisoing 60 carbon atoms arranged in a hollow football-like shape, was first synthesised. It is named after Richard Buckminster Fuller (1895-1983), a US architect who conceived the similarly-shaped geodesic dome.

1980, In the UK, the Royal Society of Chemistry was formed, from a merger of the Chemical Society (founded 1841) and the Royal Institute of Chemistry (founded 1877).

8 July 1979, Robert Burns Woodward, US chemist, died in Cambridge, Massachusetts.

7 June 1978, Ronald George Norrish, English chemist, died in Cambridge.

5 October 1976, Lars Onsanger, Norwegian-US chemist, died in Coral Gables, Florida, USA.

26 September 1976, Leopold Stephen Ruzicka, Croatian-Swiss chemist, died in Zurich, Switzerland.

18 June 1971, Paul Karrer, Swiss chemist, died in Zurich.

28 July 1968, Otto Hahn, German physical chemist, died in Gottingen.

27 March 1967, Jaroslav Heyrovsky, physical chemist, died in Prague.

8 September 1965, Hermann Staudinger, German chemist, died in Freiburg am Breisgau.

6 November 1964, Hans von Euler-Chelpin, German-born chemist, died aged 91.

1963, Xenon was found to form compounds siuch as xenon difluoride and xenon hexafluoride. Sodium xenate and sodium perxenate were also synthesised, along with the highly unstable xenon oxyflouride (XeOF4), a colourless liquid at room temperatire. XeO2F2 and xenon trioxide were also made. Krypton tetrafluoride was made at very cold temperatures but decomposed at room temperature, and divalent krypton was prepared but found to be highly explosive. There was specxulation that xenoin fluoride compounds could be used as rocket fuel, but the high price of xenon militated against this.

25 April 1963, Kevlar, a very strong substance termed liquid crystalline polymers, that can make bullet-proof vests, was patented by Du Pont, USA.

20 June 1958, Kurt Alder, chemist, Nobel prize winner, died.

24 January 1957, Paul Walden, Russian-German chemist, died in Gammertingen, Germany.

26 July 1956, Superglue was launched in New York, USA. It was sold in Britain from 1976.

24 March 1956, Willem Hendrik Keeson, Dutch physicist who explored the properties ofliquid helium and even produced solid helium, died in Oegstgeest.

1955, Artificial diamonds were first made.

7 March 1954, Otto Paul Hermann, German chemist, died in Kiel.

12 August 1946, Alfred Stock, German chemist, died in Karlsruhe.

16 April 1943, Swiss chemist Albert Hoffman accidentally consumed some of the new substance LSD he had made (see 7 April 1943), and experienced its hallucinogenic properties. LSD became popular as a drug in the 1960s.

7 April 1943. The drug LSD (lysergic acid di-ethylamide) was first synthesised by Swiss scientist Albert Hoffman.

30 March 1943, Silly Putty was patented in the USA.

 

DDT discovered

12 October 1965, Paul Muller, the Swiss chemist who formulated the insecticide DDT in 1939, died in Basle.

28 October 1948, Swiss chemist Paul Muller was awarded the Nobel Prize in Chemistry for his discovery of DDT.

1939, DDT (dichloro-diphenyl-trichloroethane, (ClC6H5)2CHCHCl2) was discovered by Swiss chemist Paul Muller. It was used to control malaria-spreaidng insects but they developed resistance. DDT persists in the environment is is now banned in most countries.

12 January 1899, Paul Muller, the Swiss chemist who formulated DDT, was born.

 

12 December 1939, Nylon, the new synthetic fibre developed by Wallace Carothers of DuPont, went into commercial production at the company�s new Seaford Plant, Delaware, USA.

1 July 1939, Teflon was patented by Roy Plunkett, USA.

12 February 1939, Soren Peter Lauritz Sorensen, Danish chemist, died in Copenhagen.

6 April 1938. Teflon was accidentally invented by US lab assistant Jack Rebok. He opened a gas cylinder of freon (tetrafluorothylene) and no gas came out; however the cylinder was still heavy. Upon inspection, the gas had polymerised into a greasy white powder. During World War Two, Teflon, being extremely inert, was found to be the only material that would resist the corrosive effects of uranium hexafluoride, a key chemical in the construction of the atom bomb; hence Teflon became a military secret. In 1960 it began to be used on non-stick pans, although initial problems with the non-stick coating not adhering tp the pan had to be overcome. It now has uses in coating buildings to prevent corrosion, as electrical insulation, a flame retardant, and in artificial body joints.

24 February 1938, Manufacture began of the first commercially produced nylon product, toothbrush bristles, by DuPont in their Arlington, New Jersey, plant.

15 April 1935, Charles Frederick Cross, English chemist, died in Hove, Sussex.

29 January 1934, Fritz Haber, German chemist, died in Basel, Switzerland.

1933, ICI chemist R.O.Gibson produced polyethylene, the polymer of ethylene gas. An easily-moulded white inert water-resistant solid insulator, it was marketed as �polythene�. It was used for electric cable insulation. In 1938 Tupperware was produced from this plastic.

1932, Deuterium, heavy hydrogen, was discovered by Harold Urey. In nature about 1 in 6,500 hydrogen atoms is deuterium.

4 April 1932. Vitamin C was isolated by Charles Glen King, professor of chemistry at the University of Pittsburgh.

1930, CFCs (chloro-fluoro-carbons) were invented by Thomas Midgley.

13 December 1930, Fritz Pregl, Austrian chemist, died in Graz.

6 August 1930, Joseph Achille le Bel, French chemist, died in Paris.

1 February 1928. In the USA, Dr Herbert Evans discovered vitamin E.

5 July 1927, Karl Martin Leonhard Albrecht Kossel, German biochemist, was born in Heidelberg.

3 December 1924, Louis Marie Hilaire Bernigaud, comte de Chardonnet, French chemist, died in Paris.

25 July 1924, Pierre Maurice Gy, French chemist, was born in Paris (died 5 November 2015).

26 May 1922, Ernest Solvay, Belgian chemist, died in Brussels.

6 December 1920, George Porter, English chemist, was born in Stainforth.

15 July 1919, Emil Hermann Fischer, German chemist, died in Berlin.

30 June 1919, Lord Rayleigh, British scientist who discovered the inert gas argon in 1894 and won the Nobel prize, died in Witham, Essex, aged 76.

8 September 1918, Derek Harold Richard Barton was born in Gravesend, England. In 1949 he started research on the shape of complex organic chemical molecules, and how this shape affected their chemical properties.

1916, British chemist G N Lewis developed a valency theory, which was later also stated independently by Kossel.

23 July 1916, Sir William Ramsey, chemist who discovered helium, and isolated neon, krypton, and xenon, died in High Wycombe, Buckinghamshire.He was awarded the Nobel Prize in 1904.

29 March 1915,. Stainless Steel was patented by Harry Brearley (1871-1948), of Sheffield, UK. Such steel must contain at least 132% chromium, and also be less than 1% carbon.Nickel is also added to improve the steel.

27 December 1914, Charles Martin Hall, US chemist, died in Daytona Beach, Florida.

1913, First use of the word �isotope�, denoting two or more atomic forms of the same element.

20 August 1913. Harry Brearley of Sheffield cast the first stainless steel. It is an alloy of chromium and steel, and does not rust or tarnish. By 1917 it was being used for household ware such as kitchen sinks.

1 February 1913, Formica was patented, initially as a substitute �for-mica�. Mica being used for electrical insulation. Formica is made by compressing layers of paper impregnated with phenolic acid. Formica initially was always black or brown, but in the 1920s coloured versions became available, and were used for �modern� furniture coverings. It was easy to clean and water-resistant.

1912, In the USA, the Corning Glass Company discovered that adding 10-15% boron oxide to glass gave it a much lower coefieient of thermal expansion, making it heat resistant. This Pyrex glass was useful for cooko9ng utensils and chemical lab glassware.

17 June 1912. Discovery of the production of synthetic rubber on a commercial scale.

12 May 1910, Dorothy Hodgkin, British chemist, was born (died 1994).

2 April 1910. Karl Hoffman, German scientist, made artificial rubber from butadiene.

1909, Sorensen proposed the pH Scale, as the negative logarithm of the concentration of Hydrogen ions, as a measure oof acidity.

1909, Bakelite was invented by Leo Baekeland. He was searching for an artificial substitute for shellac, which was then the only insulating coating for electrical wires. He mixed phenol with formaldehyde to obtain his new substance.

11 December 1909, Ludwig Mond, British chemist, died (born 7 March 1839).

2 July 1909, Fritz Haber succeeded in sustaining his ammonia production process for 5 hours, proving that it could produce commercial quantities of ammonia.

1908, Fritz Haber invented a process for the manufacture of ammonia from hydrogen and nitrogen, important for fertiliser.

1908, Cellophane was first produced when Swiss chemist Dr Jacques Brandenburger used regenerated celluloise to make a thin plastic sheet. Cellophane was first made commercially in Paris from 1912.

29 February 1908, Onnes, a Dutch scientist in Leyden, announced he had liquefied helium.

14 July 1907, Sir William Henry Perkin, English chemist, died in Sudbury, Middlesex.

18 October 1906, Friedrich Konrad Beilstein, Russian chemist, died in St Petersburg.

11 February 1904, Russian chemist Vladimir Markovnikov died in Moscow.

4 February 1903, Alexander Imich, US chemist, was born in Czestochowa (died 2014)

10 August 1902, Arne Wilhelm Tiselius, Swedish chemist, was born in Stockholm.

10 July 1902, Kurt Alder, German chemist, was born.

23 December 1901, Sir Joseph Gilbert, English chemist, died (born 1 August 1817).

10 December 1901. Nobel prize first awarded. Swedish chemist Alfred Nobel had invented a powerful new explosive, called dynamite. He thought that, if two armies could annihilate each other in an instant, war would become impractical, an idea similar to the MAD (Mutual Assured Destruction) concept that kept the peace during the Cold War of the 1950s, 60s and 70s. Nobel made a fortune from his new explosive and when he died in 1896 he left most of that fortune to a Foundation to award prizes annually to those who in the preceding year have most benefitted mankind. The first Nobel Prize was worth US$ 30,000. They are awarded in Stockholm and Oslo, in the categories of literature, chemistry, physics, medicine and peace. The first ever Nobel Prize was shared between Jean Henri Dunant (founder of the Red Cross) and Frederic Passy (founder of the French Society for the Friends of Peace).

1 April 1901, Francois Marie Raoult, French physical chemist, died in Grenoble, Isere.

10 February 1901, German chemist Max Joseph von Petenkofer died near Munich.

1900, The idea for cellophane was born when Swiss textile engineer Jacques Brandenberger was sat in a restaurant and someone spilled wine on a tablecloth. Brandenberger decided to develop a clear flexible film that could be sprayed onto fabric to make it waterproof. His first attempt, a mix of cellulose and glycerol, simply peeled off the fabric in large clear sheets; by 1912 Brandenberger had found a use for his product as the eyepieces in gas masks. He called the transparent sheets �cellophane�. DuPont bought the rights to the product in 1923, and by 1926 had developed a waterproof version that could be used to wrap and preserve food.

1899, Nickel Carbonyl, Ni(CO)4, was disocvered by German chemist Ludwig Mond (1839-1909)

9 August 1899, Sir Edward Frankland, English chemist, died (born 18 January 1825).

20 April 1899, Charles Friedel, French chemist, died (born 12 March 1832).

1898, Johann Hans Goldschmidt, born in Berlin, Germany, 18 January 1861, developed thermite, a mixture of aluminium powder and iron or chromium that burns at very high temperatures. It leaves a residue of pure iron or chromium, and is used in welding.

29 July 1898, John Alexander Newlands, English chemist, died in London.

15 March 1898, Sir Henry Bessemer, inventor of a process for converting cast iron into steel in 1856, died aged 85.

11 June 1897, Karl Fresenius, German chemist, died (born 28 December 1818).

10 December 1896. Alfred Bernhardt Nobel, Swedish chemist who invented dynamite, died in San Remo, Italy. See 14 July 1867.

3 November 1896, Eugen Baumann, German chemist, died in Frieburg.

15 April 1894, Swiss chemist Jean Charles Galissard de Marignac died (born 24 April 1817). He researched on atomic weights and isotopes, and explored the chemistry of the rare earths.

1890, Acridine, C₁₃H₉N, a coal tar derivative used in drugs and dye manufacture, was first isolated by Carl Graebe and H Caro.

9 April 1889, Michel Chevreul, chemist, died (born 31 August 1786)

2 January 1889, Roger Adams, US chemist, was born.

1887, Hydrazine, H2N-NH2, was first prepared by Curtius.

26 November 1885, Thomas Andrews, Irish chemist, died (born 19 December 1813 in Belfast).

1881, Citric acid, C3H4(OH) (CO.OH)3 was first artificially suythesised by Grimeaux and Adam.

1879, Saccharine was discovered by Ira Remsen and Constantin Fahlberg. It was found to be 300x sweeter than sugar.

19 January 1878, Henri Victor Regnault, French chemist, died in Auteuil.

22 December 1877. Liquid oxygen was made for the first time, in Geneva.

2 September 1877, Frederick Soddy, chemist, was born.

5 May 1877, Joseph Bienaime Caventou, French chemist, died in Paris.

21 June 1876, Willem Hendrik Keesom, Dutch physicist, was born in Texel, Netherlands. He solidified helium, which can only be achieved at high pressures and low temperatures.

30 April 1876, Antoine Balard, chemist, died in Paris ( born in Montpellier, France, 30 September 1802)

24 October 1873, Frederick Calvert, English chemist, died (born 14 November 1819).

10 April 1873, Justus von Liebig, German chemist, died.

8 April 1871, Jean Guimet, French industrial chemist, died (born 20 July 1795). In 1828 he won an award for inventing artificial ultramarine, as a substitute for the ultramarine prepared from lapis lazuli.

 

Mendeleev, Periodic Table

7 January 1871, Mendeleev announced that the gaps in his Periodic Table represented undiscovered elements. These elements were discovered in 1875, 1879 and 1885, making Mendeleev famous.

6 March 1869, Dmitri Mendeleev, Russian scientist (1834-1907), published his first version of the Periodic Table. By grouping the 63-then-known elements by properties, it was now possible to see where gaps existed and new elements awaited discovery. Mendelev predicted the discovery of a further 8 elements from his Table.

 

4 April 1870, Heinrich Magnus, German chemist, died (born 2 May 1802).

16 September 1869, Thomas Graham, British chemist, died (born 20 December 1805).

15 June 1869, A thermoplastic called celluloid, a technically-improved version of the plastic invented by the British chemist Alexander Parkes, was patented by American inventor John Wesley Hyatt of Albany, New York.

9 January 1869, Richard Wilhelm Heinrich Abegg, German chemist, was born in Danzig (now Gdansk, Poland). He showed that the outer electron shell of an atom determines its chemical properties.

1868, Indole, C8H7N, was first synthesised by A Baeyer.

14 July 1868, Dynamite was first tested in Sweden; it was invented by Alfred Nobel.

9 January 1868, Soren Peter Lauritz Sorensen, Danish chemist, was born in Javreberg. In 1909 he introduced pH as a measure of acidity and alkalinity.

1867, Carbonyl oxysulphide, COS, was first prepared by C Than.

27 November 1867, Thomas Clark, Scottish chemist, died (born 31 January 1801).

1 June 1867, Theophile Jules Pelouze, French chemist, died in Paris (born February 1807 in Valognes, Normandy)

1866, The formula of ozone was proved by Soret to be O3.

11 February 1866, William Brande, English chemist, died in Tunbridge Wells (born in London 11 January 1788).

1865, Hydroxlamine, or hydroxyl-ammonia, NH2OH, was first prepared by WC Lossen.

12 October 1865, Arthur Harden, chemist, was born.

24 October 1865, Nobel was granted a patent in the USA for his new invention of dynamite.

1863, The explosive Trinitrotoluene, TNT, was first synthesised by the German chemist J Wilbrand. Semtex is a modern version of TNT.

19 December 1863. Frederick Walton of London patented linoleum.

6 December 1863, Charles M Hall, who discovered in 1887 a means to make aluminium from alumina using electric power, was born in Thompson, Ohio.

14 November 1863, Leo Baekeland, US chemist who invented Bakelite, an early plastic, was born in Ghent, Belgium.

28 August 1863, Eilhardt Mitscherlich, German chemist, died (born 7 January 1794).

1862, Acetylene, C2H2, was discovered by Berthelot. From the 1880s, it was much used for generating light.

 

Artificial dyes 1856-75

With artificial chemical dyes, a huge range of products became possible, These included colourful clothing, postage stamps, colour films, eye-catching posters, and bright wallpaper.

1875, London orange dye was first synthesised.

1871, Alizarin Red dye was first synthesised.

1864, Dahlia Pink, Perkin�s Green, and Manchester, or Bismark, Brown dyes were first synthesised.

1863, Aniline Yellow and Aniline Black dyes were first synthesised.

1862, Bleu de Lyon dye was first synthesised.

1860, Violet Imperial dye was first synthesised.

1858, August Wilhelm von Hofmann synthesised the artificial dye magenta, from coal tar. It was named magenta in 1857 by the French after they defeated the Italians at the Battle of Magenta.

1856, The frst artificial dye, aniline purple, was synthesised. This started a fashion craze for the colour in England.

 

1860, German chemists Robert Wilhelm von Bunsen and Gustav Kirchoff discovered that each element emits a characteristic wavelength of light. This was the start of spectrum analysis.

1858, Italian chemist Stanislao Cannizzaro differentiated the atomic weight and molecular weight of an element.

19 August 1856, Charles Frederic Gerhardt, chemist, died.

9 March 1856, Edward Goodrich Acheson was born in Washington, Pennsylvania, USA. In 1891 he discovered a process for making carborundum (silicon carbide, SiC), a material almost as hard as diamond.

17 October 1855, Henry Bessemer patented a steel-making process.

1854, Ethyl isocynate, C2H5NCO, was first prepared by A Wurtz.

15 April 1854, Arthur Aikin, English chemist, died in London (born 19 May 1773 in Warrington).

21 September 1853, Heike Kammerlingh was born in Groningen, Netherlands. In 1908 he liquefied helium.

2 September 1853, Wilhelm Ostwald, chemist, was born.

13 April 1853, Leopold Gmelin, German chemist, died (born 1788).

12 March 1853, Mathieu Orfila, French chemist, died in Paris (born in Minorca 24 April 1787)

1852, English chemist Edward Frankland developed the idea of chemical valence; that two elements combine only in fixed proportions.

2 October 1852, Lord Ramsay, who discovered the inert gases, was born in Glasgow.

28 September 1852, Henri Moussan, French chemist, was born (died 20 February 1907).

1850, The Bunsen Burner was invented by German chemist Robert Wilhelm Bunsen.

24 March 1849, Johann Dobereiner, German chemist, died (born 15 December 1780).

8 September 1848, Viktor Meyer, German organic chemist, was born in Berlin.

7 August 1848, Jons Berzelius, chemist, died in Stockholm

1845, The explosive Nitrocellulose was invented; in 1847 Nitroglycerine was invented. They are both explosive but too unstable for normal use.

13 March 1845, John Daniell, English chemist, died (born 12 March 1790).

1844, Wurtz first prepared copper hydride, CuHn.

24 July 1843, Sir William Abney, English chemist, was born in Derby (died in Folkestone 3 December 1920).

1841, Jons Jakob Berzelius discovered allotropy, where the same chemical element exists in two or more different firms.

24 February 1841, Karl James Peter Graebe was born in Frankfurt am Main. He discovered the structure of the alizarin molecule in 1868, a natural dye. This meant it could now be synthesised from coal tar, which was done in 1869.

1839, Ozone, O3, was discovered and named by German-Swiss chemist Christian F Schonbein (1799-1868)

15 September 1839, Georg Lunge, Germen chemist, was born.

7 March 1839, Ludwig Mond, British chemist, was born (died 11 December 1909).

1838, French chemist Frederic Kuhmann succeeded in preparing nitric acid HNO3 by the catalytic oxidation of ammonia

gas NH3, using platinum as a catalyst. However when the German chemist Carl Bosch (1874-1940) discovered a replacement catalyst made of iron, bismuth and manganese, then nitric acid production could be done on an industrial scale. This facilitated the large scale production of nitrates for fertiliser, replacing nitrates imported from Chile.

16 April 1838, Ernst Solvay was born in Rebecq, Belgium. In 1861 he discovered a method for manufacturing sodium carbonate

from salt water, ammonia and carbon dioxide which was much more economical than earlier methods.

12 March 1838, Sir Henry Perkin, British chemist who synthesised the first artificial dye (aniline purple) was born.

28 November 1837, John Wesley Hyatt, inventor of celluloid, was born in Starkey, New York State.

25 August 1837, Henry William Crawford of London patented a process for galvanising iron.

1836, Edmund Davy discovered acetylene, C2H2, a gas that burns at a very high temperature and can also be used to make artificial rubber.

2 September 1836, William Henry, English chemist, died (born 12 December 1775).

1835, Jean Baptiste Andre Dumas and Euhgene Melchior Peligot prepared methyl alcohol, CH3OH.

6 December 1835, Rudolf Fittig, German chemist, was born.

31 October 1835, Johann Baeyer, German chemist, was born in Berlin.

13 February 1834, German chemist Heinrich Caro was born in Posen (now Poland). In 1834, after learning about the synthesis of dyes from William Perkin in England, he returned to Germany to start the development of the German dye industry.

17 May 1836, Norman Lockyer, discoverer of helium, was born.

1833, German chemist Karl Reichenbach discovered creosote.

21 October 1833, Alfred Nobel, Swedish chemist who invented dynamite in 1867, was born in Stockholm.

1832, Eilhardt Mitscherlich prepared nitrobenzene in the laboratory.

17 June 1832, Sir William Crookes, English chemist, was born.

12 March 1832, Charles Friedel, French chemist, was born (died 20 April 1899).

1831, Jons Jakob Berzelius discovered isomerism. This is the phenomenon where two or more compounds exist with the same proportion ot atoms but with different strtuctural arrangements and properties.

1831, Robiquet and Colin discovered the red dye alizarin.

1830, Permanganate acid, HMnO₄, was first obtained by German chemist Eilhard Mitscherlich (1794-1863)

29 October 1827, Marcellin Berthelot, French chemist, was born in Paris (died in Paris 18 March 1907).

1827, Selenous acid,H2SeO3, was first obtained by German chemist Eilhard Mitscherlich (1794-1863)

17 July 1827, Sir Frederick Augustus, English chemist, was born.

7 March 1827, John Gladstone, English chemist, was born (died 6 October 1902).

1826, Urea, also known as carbamide, CO(NH2)2, was first artificially synthesised by Wohler.

13 July 1826, Stanislao Cannizzaro, Italian chemist, was born (died 1910).

1825, Benzene, C6H6, was discovered by Faraday.

18 January 1825, Sir Edward Frankland, English chemist, was born (died 9 August 1899).

1823, Michael Faraday liquefied chlorine. This was soluble in water, and found applications in cleaning, water purification and warfare,

1822, GS Serullas discovered Iodoform, CHI3. It is an antiseptic.

1822, Leopold Gmelin discovered potassium ferricyanide, K3 [Fe(CN) 6]

6 November 1822, Claude Berthollet, French chemist, died in Arcueil (born in Talloire, Savoy 9 December 1748).

21 February 1822, Oliver Gibbs, US chemist, was born (died 9 December 1908).

20 April 1821, Franz Achard, Prussian chemist (born 28 April 1753 in Berlin) died in Silesia.

15 March 1821, Austrian chemist Johann Joseph Loschmidt was born in Putschirn, Bohemia. He was the first to use the convention of single lines for single chemical bonds, double lines for double bonds.

1819, French chemists Pierre Louis Dulong and Alexis Therese Petit formulated the rule that the product of the relative atomic weight and the specific heat of any element is constant.

1819, John Kidd, born London, 10 September 1775, derived naphthalene, C10H8, from coal tar.

14 November 1819, Frederick Calvert, English chemist, was born (died 24 October 1873).

1818, Strychnine was discovered by French chemists Pierre Joseph Pelletier (1788-1842) and Bienaime Caventou (1795-1877)

1818, Louis Jacques Thenard, born in La Louptiere, France, 4 May 1777, discovered hydrogen peroxide, H2O2.

28 December 1818, Karl Fresenius, German chemist, was born (died 11 June 1897).

27 September 1818, Adolph Wilhelm Hermann Kolbe was born in Elliehausen, Germany. In 1845 he synthesised acetic acid CH3COOH from non-organic compounds.

8 April 1818, August Hofmann, German chemist, was born (died 5 May 1892).

1 August 1817, Sir Joseph Gilbert, English chemist, was born (died 23 December 1901).

24 April 1817, Jean Marignac, Swiss chemist, was born (died 15 April 1894).

1816, Andrew Ure, born Scotland 18 May 1778 ,invented the alkalimeter.

21 August 1816, Charles Gerhardt, French chemist, was born (died 19 August 1856).

1815, Cyanogen, C2N2, was first prepared by Gay-Lussac.

1815, English chemist William Prout hypothesised that the atomic weight of any element vas a whole number multiple of the atomic weight of hydrogen. This became a useful tool in the clasification of elements.

21 May 1815, William Nicholson, chemist, died in London, England.

20 February 1814, Edmond Fremy, French chemist, was born (died 3 February 1894),

29 December 1813, Alexander Parkes, the chemist who invented celluloid, was born in Birmingham.

19 December 1813, Thomas Andrews, Irish chemist, was born in Belfast (died 26 November 1885).

1812, Nitrogen Chloride, NCl3, was first prepared by Pierre Dulong. It is a sensitive and explosive substance, and several chemists, including Dulong himself, have been injured din explosions caused by it.

1812, Carbonyl Chloride, COCl2, phosgene, was first prepared by John Davy. It was used for dye production.

9 June 1812, Hermann von Fehling, German chemist, was born (died1 July 1885).

1811, German-Russian chemist Gottlieb Sigismund Constantin Kirchhoff, born Teterow (Germany) 19 February 17564, prepared glucose by heating starch with sulphuric acid.

1811, Jons Jakob Berzelius developed the modern system of chemical notations.

31 March 1811, Robert Bunsen, German chemist, was born in Gottingen, Lower Saxony.

24 February 1810, Henry Cavendish, English scientist who discovered the properties of hydrogen and other gases, died.

1808, Gay-Lussac formulated the Law of Volumes, of reacting gases.

1807, Jons Jakob Berzelius first classified chemicals as either organic or inorganic.

1807, Jean Antoine Claude Chaptal, born Nogaret, France, 4 June 1756, published the first book on industrial chemistry.

13 October 1806, Otto Unverdorben was born. In 1826 he discovered the dye aniline by distilling indigo.

16 January 1806, Nicolas LeBlanc, French chemist, died.

6 December 1805, Nicolas Conte, French chemist, died (born 4 August 1755).

15 October 1804, Antoine Baume, chemist, died in Paris (born in Senlis 26 February 1728).

6 February 1804, Joseph Priestley, English clergyman and chemist who discovered oxygen, died in Northumberland, Pennsylvania.

1803, Dalton formulated his Atomic Theory of Matter. This stated that matter is made of minute indestructible particles called atoms, which were all identical.

1802, Charles Law was formulated � with constant pressure, the volume of a gas is proportional to its temperature, or V = T.k.

30 September 1802, Antoine Balard, chemist, was born in Montpellier, France (died in Paris 30 April 1876).

2 May 1802, Heinrich Magnus, German chemist, was born (died 4 April 1870).

1801, Daltons Law of Partial Pressures was formulated � the total pressure of a mixture of gases is equal to the sum of the partial pressures of all the constituent gases.

31 January 1801, Thomas Clark, Scottish chemist, was born (died 27 November 1867).

31 July 1800, Friedrich Wohler, German chemist, was born in Escherheim, near Frankfurt am Main (died 1882)

15 July 1800, Jean Dumas, chemist, was born (died 11 April 1884).

9 April 1800, Humphrey Davy (born 17 December 1778 in Penzance, England) discovered nitrous oxide, N2O, also known as laughing gas.

1799, Antoine Francois isolated urea, CO(NH2)2.

1799, Laws of Chemical Affinity announced by Bertholet. This stated that elements in a compound always combined in definite fixed proportions.

6 December 1799, Joseph Black, Scottish chemist, died in Edinburgh (born 1728 in Bordeaux).

1796, Carbon disulphide, CS2, was first prepared by W A Lampadius, by heating a mixture of charcoal and pyrites.

20 July 1795, Jean Guimet, French industrial chemist, was born (died 8 April 1871). In 1828 he won an award for inventing artificial ultramarine, as a substititue for the ultramarine prepared from lapis lazuli.

1794, Ethylene, C2H4,was prepared by a group of Dutch chemists.

8 May 1794. The chemist Antoine Lavoisier, who discovered the composition of water, was executed in Paris.

7 January 1794, Eilhardt Mitscherlich, German chemist, was born (died 28 August 1863).

1793, The first chemical society was established, in Philadelphia, Pennsylvania.

12 August 1793, James Muspratt, British chemical manufacturer, was born (died 4 May 1886).

28 July 1791, Jean Gannal, French chemist, was born (died 1/1852).

12 March 1790, John Daniell, English chemist, was born (died 13 March 1845).

11 January 1788, William Brande, English chemist, was born in London (died in Tunbridge Wells 11 February 1866).

1787, Bertholet discovered the composition of ammonia NH3, hydrogen sulphide H2S and prussic acid HCN.

24 April 1787, Mathieu Orfila, French chemist, was born in Minorca (died 12 March 1853 in Paris)

31 August 1786, Michel Chevreul, chemist, was born (died 9 April 1889).

21 May 1786, Karl William Scheele, Swedish chemist, died in Koping, Sweden, aged 44.

1784, Karl William Scheele fort obtained citric acid, C3H4(OH) (CO.OH)3 in a soild state

1783, Scheele discovered glycerine, C3H8O3.

1783, Philippe Gegembre (1764-1838) first synthesised phosphine, PH3.

1783, Nicholas Leblanc (born Issoudun, France, 6 December 1742) won a prize offered by the French Government for finding a practical way to make sodium hydroxide NaOH and sodium carbonate Na2CO3 from common salt. Due to the French revolution the prize money was never paid, but the Leblanc Process did make possible the large scale production of soap.

25 June 1783, Lavoisier announced that water, H2O was the combustion product of oxygen and hydrogen, in proportions 2 hydrogen to 1 oxygen. He began to pioneer the new science of quantitative chemistry, the notion that fixed proportions of elements combined to maker a specific compound.

1782, Lavoisier observed that total weight does not change in chemical reactions, establishing the first version of the Law of Conservation of Matter.

1782, Prussic acid (hydrogen cyanide, HCN) prepared by Scheele.

1781, Scheele discovered calcium tungstate, CaWO4; the mineral is now named Scheelite after him. However he did not recognise tungsten as a new element.

1780, Scheele discovered lactic acid, CHCHCOH.

15 December 1780, Johann Dobereiner, German chemist, was born (died 24 March 1849).

13 December 1780, Johann Wolfgang was born in Hof, Bavaria. He discovered the catalytic properties of platinum, speeding up the reactions of organic gases. He also noticed similarities between elements, suggesting a Periodic Table.

1778, Alessandro Volta, studying inflammable air from marshes, discovered methane, CH4.

1776, Scheele and Bergman independently discovered uric acid, C5H4N4O3.

1776, �Inflammable air�, or carbon monoxide, CO, was prepared by Lassone.

7 June 1776, Jons Jacob Berzelius, Swedish chemist, was born in Linkoping (died 1848).

12 December 1775, William Henry, English chemist, was born (died 2 September 1836).

1774, Karl Wilhelm Scheele discovered formic acid, HCOOH

15 May 1774, Johann Fuchs, German chemist, was born (died 5 March 1856).

19 May 1773, Arthur Aikin, English chemist, was born in Warrington (died 15 April 1854 in London).

1772, Joseph Priestley discovered a method of producing sulphur dioxide, SO2.

1772, Joseph Priestley discovered nitric oxide, NO, subsequently reducing it to nitrous oxide, N2O. He also, this year, succeeded in isolating ammonia NH3 by collecting it over mercury; previously ammonia had only known in aqueous solution.

1 November 1772, The French chemist Lavoisier announced that sulphur and phosphorus, when burned, gained weight because they had �absorbed air�; similarly metallic lead prepared from litharge lost weight because it had �lost air�. The nature of this �air� was found to be oxygen in 1774 by Joseph Priestley.

1771, Picric Acid, trinitrophenol, (O₂N)₃C₆H₂OH, was first discovered. In 1885 Turpin poatented its use as an explosive for shells.

1770, Karl Wilhelm Scheele discovered tartaric acid, HO2CCH(OH)CH(OH)CO2H.

29 April 1768, Georg Brandt, chemist, died.

6 September 1766, John Dalton, English chemist was born in Eaglesfield, near Cockermouth, Cumbria, the son of a Quaker weaver.

1765, German chemist Karl Wilhelm Scheele (born Stralsund 19 December 1742) discovered prussic acid,or hydroge cyanide, HCN.

21 November 1761, English chemical manufacturer Joshua Ward died.

1755, �Fixed air� or carbon dioxide, CO2, was prepared from chalk by Joseph Black (born 15 April 1728 in Bordeuax, France, died 1799).

4 August 1755, Nicolas Conte, French chemist, was born (died 6 December 1805).

15 June 1755, Antoine Francois was born in Paris. In 1799 he isolated urea.

1754, Alkalis, metals, earths and bases were defined by Rouelle.
28 April 1753, Franz Achard, Prussian chemist (died 20 April 1821 in Silesia) was born in Berlin.

9 December 1748, Claude Berthollet, French chemist, was born in Talloire, Savoy (died in Arcueil 6 November 1822).

1746, The lead chamber process for making sulphuric acid, H2SO4,was invented by John Roebuck of Sheffield, UK.

26 August 1743, Antoine Lavoisier, French founder of modern chemistry, was born in Paris.

13 March 1733, Joseph Priestley, who discovered oxygen in 1774, was born in Leeds, the son of a cloth merchant.

10 October 1731, Henry Cavendish, who discovered hydrogen, was born in Nice, France.

6 January 1731, Etienne Geoffroy, French chemist, died (born 13 February 1672).

16 April 1728, Joseph Black, chemist, was born.

26 February 1728, Antoine Baume, chemist, was born in Senlis (died in Paris 15 October 1804).

24 September 1715, Wilhelm Homberg, Dutch chemist, died (born 8 January 1652).

19 June 1715, Nicolas Lemery, chemist, died (born 17 November 1745).

1704, Newton showed that diamonds will burn in air.

1702, Wilhelm Homberg (1652-1715) discovered boric acid, B(OH)3.

1702, Stahl burned sulphur in air to produce �volatile sulphurous acid�, or sulphur dioxide, SO2.

1695, Nehemiah Grew isolated magnesium sulphate MgSO4.H2O, known as Epsom Salts, from spring water.

1680, Boyle defined the term �salt� in chemistry.

1680, Irish scientist Robert Boyle discovered that phosphorus and sulphur burst into flames if rubbed together. This was the basis for the first matches, invented 150 years later.

13 February 1672, Etienne Geoffroy, French chemist, was born (died 6 January 1731).

1670, The �Phlogiston� theory of combustion was developed by Becher and Stahl.

1662, Boyle�s Law was formulated � with constant temperature, the volume of a gas varies inversely with the pressure on it, or V = 1/P.k.

1661, Boyle concieved of the modern idea of a �chemical element�.

8 January 1652, Wilhelm Homberg, Dutch chemist, was born (died 24 September 1715).

17 November 1645, Nicolas Lemery, chemist, was born (died 19 June 1715).

1610, The first textbook on chemistry, Tyrocinium Chymicum, was published by French scientist Jean Beguin.

1602, Vincenzio Casarido discovered barium sulphide, BaS.

1597, The work Alchemia by Andreas Libavius described the preparation of hydrochloric acid, HCl, tin tetrachloride SnCl4, and ammonium sulphate (NH4)2SO4.

1540, Ether was first produced from alcohol and sulphuric acid.

1317, Pope John XXII banned the practice of alchemy.

1315, Raymond Lully, who discovered ammonia (NH3), was stoned to death in Bougie, North Africa, for preaching against Islam.

1270, The False Geber (writing under the name of Geber, an alchemist of 5 centuries earlier), described �oil of vitriol�, or sulphuric acid, H2SO4

The pursuit of Alchemy, a rich man�s hobby in the Middle Ages, was based upon the theory that there were four �elements�; earth, air, fire and water, and that the perfect combination of these four would produce gold. Alchemists therefore sought to add or drive off various �elements� to achieve this �perfect balance�, by boiling, grinding liquefying, dissolving, heating , burningand vapourising various substances. In doing so they acquired valuable practical experience that laid the foundations of modern chemistry. For example the major acids, such as nitric, sulphuric and hydrochloric, also solvents such as alcohol, were discovered and used by alchemists to break down compounds.

Alchemists also sought the �Philospher�s Stone� � a substance that could transmute all other materials into gold.

In China, alchemists sought the Elixir of Life, and used substances such as mercury to preserve the dead; hoping that such preservation from decay of cospses might also lead to how to preserve the living from death. In India, alchemy was linked to seeking cures for diseases, and astrology had a strong influence because the planets were believed to govern health, as well as have an effect on chemical reactions.

755, Arab alchemist Abu Musa Jabir ibn Haryan, also known as Geber, born Iraq ca. 721, described how to prepare aluminium chloride, AlCl3, white lead (basic lead carbonate, 2PbCO. 3� Pb(OH)2) , nitric acid, HNO3, and acetic acid, CH3COOH.

 

Appendix 1 � Discovery of the elements (first isolated in pure form)

 

Noble Gases

Halogens, Other Non-metals, Metalloids

Alkali metals, Alkali Earth metals

As of 2019, no element beyond number.118 has been synthesised.

12/2015, The synthesis of element 115, Ununpentium, was recognised as having been accomplished by the Joint Institute of Nuclear Research, Dubna, USSR. The element has not yet been officially named.

2010, The synthesis of element 117, Tennessine, was recognised as having been accomplished by the Joint Institute of Nuclear Research, Dubna, USSR.

2006, The The officially-recognised synthesis of element 118, Oganesson, at the Joint Institute of Nuclear Research, Dubna, USSR.

2004, The officially-recognised synthesis of element 113, Nihonium, at RIKEN, Japan.

19 July 2000, The The officially-recognised synthesis of element 116, Livermorium, at the Joint Institute of Nuclear Research, Dubna, USSR.

12/1998, The The officially-recognised synthesis of element 114, Flerovium, at the Joint Institute of Nuclear Research, Dubna, USSR.

1996, The officially-recognised synthesis of element 112, Copernicium, at the Institute for Heavy Ion Research, Darmstadt, Germany.

1994, The officially-recognised synthesis of element 111, Roentgenium, at the Institute for Heavy Ion Research, Darmstadt, Germany.

1994, The officially-recognised synthesis of element 110, Darmstadtium, at the Institute for Heavy Ion Research, Darmstadt, Germany.

1984, The officially-recognised synthesis of element 108, Hassium at the Institute for Heavy Ion Research, Darmstadt, Germany.

29 August 1982, The officially-recognised synthesis of element 109, Meitnerium at the Institute for Heavy Ion Research, Darmstadt, Germany.

1981, The officially-recognised synthesis of element 107, Bohrium, at the Institute for Heavy Ion Research, Darmstadt, Germany.

6/1974, Element 106, now known as Seaborgium, was synthesised at the Joint Institute of Nuclear Research, Dubna, USSR.

105th 1969, The synthesis of Rutherfordium was confirmed at the University of Berkeley California.

1968, Dubnium was synthesised at the Joint Institute of Nuclear Research, Dubna, USSR.

1966, After several false starts, Nobelium was synthesised at the Joint Institute of Nuclear Research, Dubna, USSR.

14 February 1961, The synthesis of element Lawrencium was confirmed at University of Berkeley California. It was named after the inventor of the cyclotron, Ernest Lawrence.

1955, Mendelevium was synthesised at the University of Berkeley California.

100th 12/1952, Einstinium was first identified by Albert Ghiorso and others at the University of Berkeley California. It was found after a thermonuclear explosion.

1 November 1952, The new element Fermium was first discovered in the fall-out from a nuclear test of a Hydrogen Bomb..

17 March 1950, Californium was announced to have been made at the University of Berkeley California

12/1949, Berkellium was first synthesised at the University of Berkeley California by Glenn Seaborg, Albert Ghiorso, and Stanley Thompson.

1945, Promethium was first synthesised at Oak Ridge National Laboratory, US, by Jacob Marinsky, Lawrence Geldenin and Charles Corvell, from the fission by-products of uuranium.

95th 1944, Americium and Curium were first identified at the University of Berkeley California by Glenn Seaborg, Leon Morgan, Ralph James and Albert Ghiorso.

1940, The first confirmed discovery of the element Astatine.

14 December 1940, Plutonium was first produced by Dr Glenn Seaborg, Joseph Kennedy, Edwin McMillan and Arthur Wall at the University of California, Berkeley.

1939, Neptunium was produced as a fission product by Edwin McMillan at the Berkeley Radiation Laboratory, California.

90th 1939, Francium was discovered by Marguerite Peary at the Curie Institute, Paris.

12/1936,Technetium was confirmed as a new element at the University of Palermo by Carlo Perrier and Emilio Segre.

1925, Rhenium was discovered by Walter Noddack, Ida Tacke and Otto Berg in Germany.

1923, Hafnium was dscovered by Dirk Coster and Georg von Hevesy in Copenhagen, Denmark.

1923, Lanthanum was first isolated in pure form.

85th 1907, Lutetium was discovered independently by the French chemist Georges Urbain, the US chemist Charles James and the Asutrian mineralogist Baron Carl Auer von Welsbach.

20 February 1907, Ferdinand Frederic Henri Moissan died, probably as a result of his experiments with fluorine, see 1886.

1905, Tantalum was first isolated in pure form by Werner von Bolton. In 1902 an impure sample had been prepared by Moissan.

1900, Protactinium was isolated by William Crookes.

1900, Radon was discovered by the German, Freidrich Ernst Dom.

1899, Actinium was discovered by the French chemist Andre-Louis Debierne.

80th 1898, Xenon was discovered by William Ramsay and Morris Travers. They also discovered Neon and Krypton the same year.

 

Marie Curie; discovery of Polonium, Radium

23 January 1911, Marie Curie, Nobel prize winner, was refused admission to the all-male French Academy of Sciences. She went on to win a second Nobel prize.

7 September 1910, The first pure sample of radium was isolated by Marie Curie.

20 April 1902, Pierre and Marie Curie isolated radium from the mineral pitchblende. They were awarded the Nobel Prize in 1903 for their work on radioactivity.

26 December 1898,The new element radium was first identified, as radium chloride, by Marie and Pierre Curie. Pure radium was first prepared by Marie Curie and Andre Louis Debierne in 1911.

18 July 1898, Polonium was discovered by Marie and Pierre Curie in 1898, after samples of radium proved more radioactive than expected. They named the metal after their native Poland to highlight the lack of independence of that nation.

26 July 1895, Pierre Curie and Marie Sklodowska married in Sceaux, France. In 1896 Marie began her doctoral thesis on the radioactivity of uranium, and Pierre joined her in this research in 1898.Their daughter, Irene, was born in 1897.

7 November 1867. Marie Curie, who discovered radium, was born in Warsaw, as Marie Sklodowska.

 

75th 1895, Helium was discovered by two Swedish chemists, Per Teodor Cleve and Nils Abraham Langlet. It was isolated from radioactive minerals. The element has earlier been observed independently in 1868 by English astronomer Norman Lockyer and by French astronomer Pierre Jules Jansen through spectroscopic pobservation of the Sun.

13/81894, Argon was first discovered by British chemists Lord Rayleigh and Sir William Ramsey. It was the first Noble Gas found. Atmospheric Nitrogen was found to be lightly denser, by 0.47%, than Nitrogen obtained from chemical reactions; this margin was beyond experimental error. Therefore atmospheric Nitrogen had to contain some other gas. Removing oxygen from the air (by passing over hot metallic Copper)and then also remiving the Nitrogen (by passing over hot Magnesium) left an inert gas, which was termed �Argon� meaning un-reactive. Subsequently, 120 tons of air was liquefied and from the Argoin so obtained, the other inert gases Krypton, Xenon and Neon were discovered.

1890, Europium was discovered by French chemist Paul Emile Lecoq de Boisbradan.

5 October 1889, Dirk Coster was born in Amsterdam, the Netherlands. In 2923 he discovered, along with Gyorgy Hevesy, the element Hafnium. It was named after the Latin for Copenhagen, where the discovery was made.

70th 1886, Germanium was discovered by Dr Winkler (1838-1904). It was found in the mineral argyrodite, in Frieburg, Germany.

1886, French chemist Paul Emile Lecoq de Boisbradan isolated the new elements dysprosium andgadolinium.

26/61886, Elemental fluorine was first isolated by Ferdinand Frederic Henri Moissan. He was born on 28 September 1852 in Paris, and died aged 54, probably poisoned by fluorine. Moissan received the Nobel prize for this feat in 1906.

1885, Praseodymium and Neodymium were isolated by the Austrian chemist Baron Carl Auer von Welsbach.

1882, Elemental caesium metal was isolated by German chemist Carl Setterberg. The metal was discovered in 1860 by its blue lines in spectroscopy.

65th 1879, Samarium was discovered by the French chemist Paul Emile Lecoq de Boisbradan.

1879, Scandium was discovered.

1879, Thulium was discovered by the Swedish chemist Per Teodor Cleve.

1878. Holmuim was discovered by Marc Delafontaine and Jacques Louis Soret.

1878, Ytterbium was discovered by the Swiss chemist Jean Charles Galissard de Marignac.

60th 1875, Gallium was discovered, by Mr Lecoq de Boisbaudran (1838-1912).

1867, Vanadium was first isolated by Roscoe.

1864, Indium was first isolated in pure form by the German chemist Hieronymous Theodor Richter.

1864, Niobium was first isolated by De Marignac.

1861, Thallium was discovered by William Crookes. It appeared as a bright green line in spectroscopy, hence its name derived from thalliu, �green twig�.

55th 1861, Rubidium was discovered by German chemists Robert Bunsen and Gustav Kirchhoff. It appeared as a red line in spectroscopy, hence its name meaning �red�.

1 September 1858, Karl Auer, later Baron von Welsbach, was born in Vienna, Austria. In 1885 he discovered that what was thought to be one chemical element was in fact two. He named these neodymium (�new twin) and praseodymium (�green twin�) for the colour of its spectrum.

1844, Ruthenium was officially discovered by Karl Ernst Klaus, at Kazan University.

1843, Swedish chemist Carl Gustaf Mosander discovered erbium andterbium in 1843.

1841, Uranium was first isolated in pure form by French chemist Professsor Eugene Melchior Peligot (born 24 February 1811).

50th 1829, Thorium was discovered by Berzelius.

1828, Yttrium was first isolated by Friedrich Wohler. It had first been discovered in 1794 by Finnish chemist Johan Gadolin, and in the late 20th century began to be used in colour televisions.

1828, Beryllium was isolated independently by Freidrich Wohler and by Antoine Bussy.

1827, Aluminium was first isolated by Friedrich Wohler. Before the process of electrolytically isolating the metal was discovered in 1886, aluminium was so expensive it was used for jewellery, despite being the third commonest element in the Earth�s crust.

1825, Bromine was discovered by Carl Jacob Lowig in 1825. Berzelius coined the name halogens to describe the elements Fluorine, Chlorine, Bromine and Iodine.

45th 1824, Zirconium was first isolated by Berzelius. Zirconium oxide, ZrO2, had been discovered in 1789 by Martin Klaproth.

1817, Silicon was first formally identified as a new element by the Scottish chemist Thomas Thomson. In 1811 some impure silicon was first isolated by Gay-Lussac and Thenard, but not actually identified as such. Pure silicon was first isolated in 1823.

1817, Lithium was recognised as a new element by Johan August Arfwedson.

1817, Cadmium, as an element, was discovered in Germany simultaneously by Freidrich Stromeyer and by Karl Samuel Leberecht Hermann.

1817, Selenium was discovered by Swedish chemists Jons Jakob Berzelius and Johan Gottlieb Gahn.

40th 1811, Iodine was discovered by French chemist Bernard Courtois (1777-1838).

1808, Calcium was first isolated in pure form by Sir Humphrey Davy.������������

1808, Boron was first isolated and recognised as an element by Sir Humphrey Davy.

1808, Barium was first isolated as a new elememnt by Sir Humphrey Davy.

1808, Strontium was isolated by Sir Humphrey Davy

35th 1808, Magnesium metal was first isolated by Sir Humphrey Davy.

19 October 1807, Elemental sodium metal was first isolated by Sir Humphrey Davy.

6 October 1807, Sir Humphrey Davy discovered a new metal which he called potassium.

1803, Cerium was discovered independently by both Martin Heinrich Klaproth of Germany and by Wilhelm Hisinger and Jins Jakob Berzelius of Sweden.

1803, Rhodium ws discovered by William Hyde Wollaston.

30th 1803, Osmium and iridium were discovered by Smithson Tennant and William Hyde Wollaston, in London, UK.

1802, Palladium was discovered by William Hyde Wollaston.

1798, Chromium metal was isolated by Louis Nicolas Vauquelin (born 61 May 1763). He named it from its brightly-coloured compounds.

1791, Titanium was discovered in Cornwall by the clergyman and amateur geologist William Gregor (born 25 December 1761).

25th 1789, Antoine Lavoisier listed carbon as an element in his 1789 textbook. Carbon in the form of diamond was known in China as early as 2,500 BC. Carbon as soot or charcoal has been known to mankind since prehistoric times.

24th 1789, Tellurium was isolated by a Hungarian scientist, Pal Kitaibel. However he gave the credit to Franz Joseph Muller von Reichtenstein, Austrian Inspector of Mines, who had worked for several years on some anomalous ore before determining the density and other properties of the new element in 1785.

23rd 1783, Tungsten was first isolated in pure form by the brothers Jose and Fausto Elhuyar (born 11 October 1755 in Logrono, Spain).

22nd 1781, Molybednum was first isolated by Peter Jacob Hjelm (born 2 October 1746,in Sweden).

21st 1777, Antoine Lavoisier found that sulphur is an element. Sulphur has been known since prehistoric times, being easily available as surface deposits in volcanic areas.

20th 1774,Manganese was first isolated by Johan Gottleib Gahn.

19th 1774, Chlorine was first recognised as an element by the Swedish chemist Carl Wilhelm. He reacted hydrochloric acid HCl with manganese dioxide MnO2. He called it �dephlogisticated marine acid air�. In 1630 chlorine had been studied by the Flemish chemist Jan Baptist van Helmont but he did not recognise it as a new element.

18th 1 August 1774, British chemist Sir Joseph Priestley announced he had discovered oxygen.

17th 1772, The Scottish physicist Daniel Rutherford is credited with the discovery of nitrogen in 1772; he called it �noxious air�, although he did not at the time recognise it as a separate element.

16th 1766, Henry Cavendish first recognised hydrogen as a separate substance, calling it �inflammable air�. He went on to discover that the �inflammable air� produced water when burnt. Hydrogen was goven its name by Antoine Lavoisier, meaning �producer of water�, when he replicated Cavendish�s experiment of producing water by burning hydrogen.

15th 1748, Platinum was recognised as an element by Charles Wood of the UK and Antonio de Ulloa of Spain. Hiowever for several centuries before that platinum had been recognised as a sometimes unwelcome adulterant of gold.

14th 1735, Cobalt, whose compounds have been used to colour glass blue for over 4,000 years (and feared by miners because it was always associated with arsenic, whose oxide was poisonous), was proved to be a separate element by Swedish chemist Georg Brandt.

1669, Phosphorus (the 13th element to be recognised as such) was discovered by the German alchemist Hennig Brand, during experiments distilling urine. The substance glows in the dark, and its name derives from the Latin for �morning star�.

12th 1546, Bismuth was mentioned by Agricola in De Natura Fossilium; however the metal has been knwn since well before 0 AD, albeit sometimes confused with tin and lead.

11th 1540, A procedure for isolating antimony was written down in the book De la Pirotechnica, by Vannoccio Biringuccio. However antimony and its compounds have been used by mankind since before 3,000 BC.

10th 1374, Zinc, in use in brass items since as early as 1400 BC, was first named specifically in the Jasada, a medical dictionary ascribed to the Hindu King Madanapala.

9th 1250, Arsenic, in use since at least 1,000 BC, was first isolated in pure form by Albertus Magnus.

8th 600 BC, Pure tin began to be used. Tin as an alloy with copper, bronze, has been in use from 3600 BC.

6th 7th 1500 BC, Mercury artefacts found in Egyptian tombs dating from this time. Meanwhile nickel (white copper) was known in China from about this time. Mediaeval German miners encountered ore that looked like copper ore but gave no copper, and named it after a mischievous sprite, �nickel�, analogous to the name �old Nick� for the Devil.

5th 3500 BC Iron artefacts found originating from this time. Iron was much tougher than copper or bronze, but required much higher temperatures to smelt and forge it.

3rd, 4th 4000 BC, Gold artefacts found dating from this time. Silver useage also dated back to this time.

2nd 7000 BC Lead began to be used widely across the world. Lead and tin, both malleable and both reasonably abundant and easily mined, were used together and sometimes interchangeably.

1st 9000 BC, Copper in use by mankind. By 5000 BCE, copper was being smelted in Persia from malachite. Howevet the metal was too soft to keep an edge, for knives; by 3600 BCE copper was being mixed with 5% to 20% tin to make bromze, a much tougher metal.

 

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