Guide
1
Pundits still antiquity discovered copper, silver, gold, lead, tin, iron and carbon and other chemical elements - antimony (formerly 3000th BC), mercury (up to 1500 BC), zinc (about 1300-1000 BC), and sulfur (about the 6th century BCE).
2
Middle Ages gave humanity three discoveries - arsenic (in 1250, the author is not known), bismuth (in 1450 and also did not know the name of the discoverer) and phosphorus, which in 1669 opened a German Hennig Brand.
3
became more prolific 18th century: in 1735 the Swede Brandt discovered cobalt;in 1748th platinum Spaniard de Mendoza;in
1751 the Swede Cronstedt nickel;1766 m 1772nd hydrogen and nitrogen Briton Cavendish;1774 J. oxygen. Priestley;involving Swede Scheele become known manganese, chlorine, barium, molybdenum and tungsten;in 1782 the Austrian background Reyhenshteyn discovered the element tellurium;in 1789th German uranium and zirconium Klaproth;in 1790 the British Crawford and Klaproth discovered strontium;in 1794th opened Finn yttrium gadolinium in 1795. German Klaproth titanium, beryllium and chromium, and the Frenchman L. Vauquelin.
4
even more chemical elements were known in the 19th century: in 1801 Hatchet - niobium;1802nd in Ekeberg - tantalum;in 1803 Wollaston and Berzelius discovered palladium and cerium;in the 1804th was discovered iridium, osmium, rhodium and scientists from the United Kingdom;British Davy discovered in 1807, just two - sodium and potassium;Forest in the 1808th - Gay-Lussac, calcium and magnesium in the same year, the same Devi;Iodine is found in 1811. Courtois;Cadmium - 1817th Strohmeyer;Selenium - the same Berzelius;Lithium - but then the Swede arfvedsonite;silicon - in 1823 th Berzelius;vanadium - in 1830th Swede Sefstrom;the opening of three elements (lanthanum, erbium and terbium) took place with the participation of Swedish Mosander;ruthenium 1844th Kazan found Klaus;rubidium and cesium - in 1861 - Bunsen and Kirchhoff;thallium - in 1861st Crooks;Indium - in 1863 the Germans Reich and Richter;Halle - in 1875th Frenchman Lecoq de Boisbaudran;ytterbium - in 1878 the Swede Marignac;thulium - in 1879th Cleves;Samara - 1879 Lecoq de Boisbaudran;holmium - in 1879th Cleves;scandium - in 1879 the Swede Nilsson;praseodymium and neodymium - in the 1885th Austrian Auer von Welsbach;fluoro - Moissan in 1886;Germany - 1882nd Winkler;gondola and dysprosium - in the same year Lecoq de Boisbaudran;argon, helium, neon, xenon and krypton - in 1898 the British Ramsay and Travers;polonium and radium - in 1898, the couple Curie;Radon - in 1899th British Owens and Rezenford and in the same year the Frenchman found Debierne anemones.
5
In the 20th century, scientists from various countries have found the following chemicals: Europe - 1,901th DeMars;lutetium - in 1907 the Frenchman Urbain;protactinium - in 1918 a team of German experts;hafnium - in 1923 the Danes Coster and Hevesy;Rhenium - in 1927th German Noddak;Technetium - in 1937, a team of scientists from the United States and Italy;France - 1923 th French Perey;the efforts of American researchers mankind owes known astatine, neptunium, plutonium, americium, curium, promethium, Berkeley, California, Einstein, Fermi, and mende-;in Dubna near Moscow in the 20th century were found Nobel, Lawrence, Rutherford, Dubna, and seaborgium Boriy;in Germany in the 80s we found Meitner Hasse Darmstadt, X-ray and Copernicium, and in 1999 and 2000 in the same Dubna found Flerov and Livermore.