| Date | Event |
|---|---|
| 1668 | Periodic tablePeriodic table was first published by Dmitri Mendeleev in 1869.The elements carbon, sulfur, iron, tin, lead, copper, mercury, silver, and gold are known to humans since ancient times. |
| 1669 | PhosphorusPhosphorus was discovered by German alchemist Hennig Brand. |
| 1735 | CobaltCobalt was first discovered by a Swedish chemist Georg Brandt. |
| 1748 | PlatinumPlatinum was discribed by Julius Caesar Scaliger in 1557. But the metal was observed by Antonio de Ulloa and Don Jorge Juan y Santacilia in 1748. |
| 1751 | NickelNickel was discovered by the Swedish chemist Axel Fredrik Cronstedt. |
| 1766 | HydrogenHydrogen was discovered by English chemist and physicist Henry Cavendish. |
| 1772 | NitrogenNitrogen was discovered by Scottish chemist Daniel Rutherford. |
| 1774 | ChlorineChlorine was discovered by a Swedish scientist, Carl Willam Scheele. |
| 1774 | ManganeseManganese was first observed by Swedish chemist Johann Gottlieb Gahn. |
| 1774 | OxygenOxygen was discovered by English chemist Joseph Priestley and Swedish chemist Carl Wilhelm Scheele. |
| 1781 | MolybdenumSwedish chemist Peter Jacob Hjelm isolated molybdenum in 1781. However molybdenum was discovered by Carl Welhelm Scheele, a Swedish chemist, in 1778. |
| 1782 | TelluriumTellurium was discovered by Austrian mineralogist Franz-Joseph Müller von Reichenstein. |
| 1783 | TungstenIn 1781, Carl Wilhelm Scheele discovered that a new acid, tungstic acid, could be made from scheelite. Tungsten was isolated by on Juan José D'Elhuyard and Don Fausto D'Elhuyard, Spanish chemists and brothers, in 1783, and they are credited with the discovery of the element. |
| 1789 | UraniumUranium was discovered by German chemist Martin Heinrich Klaproth. |
| 1789 | ZirconiumZirconium was discovered by German chemist Martin Heinrich Klaproth. |
| 1791 | TitaniumTitanium was first discovered by English clergyman William Gregor. |
| 1794 | YttriumYttrium was discovered by Finnish chemist Johan Gadolin. |
| 1797 | ChromiumChromium was discovered by French chemist Louis-Nicolas Vauquelin. |
| 1798 | BerylliumBeryllium was discovered by French chemist Louis-Nicolas Vauquelin. |
| 1801 | NiobiumNiobium was discovered by the English chemist Charles Hatchett. |
| 1801 | VanadiumVanadium was discovered by Mexican chemist Andrés Manuel del Río discovers vanadium. |
| 1802 | TantalumTantalum was discovered by Swedish chemist and mineralogist Anders Gustaf Ekeberg. |
| 1803 | PalladiumPalladium was discovered by English chemist and physicist William Hyde Wollaston. |
| 1803 | RhodiumRhodium was discovered by English chemist and physicist William Hyde Wollaston. |
| 1803 | IridiumIridium was discovered by English chemist Smithson Tennant. |
| 1803 | CeriumCerium was discovered in Sweden by Jön Jakob Berzelius and Wilhelm Hisinger, and independently in Germany by Martin Heinrich Klaproth, both in 1803. |
| 1804 | OsmiumOsmium was discovered by English chemist Smithson Tennant. |
| 1807 | PotassiumPotassium was discovered by English chemist Sir Humphry Davy. |
| 1807 | SodiumSodium was discovered by English chemist Sir Humphry Davy. |
| 1808 | BariumBarium was isolated by English chemist Sir Humphry Davy. |
| 1808 | StrontiumStrontium was isolated by English chemist Sir Humphry Davy. |
| 1808 | CalciumCalcium was discovered by English chemist Sir Humphry Davy. |
| 1808 | MagnesiumMagnesium was discovered by Joseph Black, in England, in 1755. The element was isolated by A. A. B. Bussy and Sir Humphrey Davy in 1808. |
| 1808 | BoronBoron was first discovered by Sir Humphrey Davy, Joseph-Louis Gay-Lussac and Louis Jacques Thênard. |
| 1811 | IodineIodine was discovered by the French chemist Bernard Courtois. |
| 1817 | LithiumLithium was discovered by Swedish chemist Johan August Arfwedson. |
| 1817 | CadmiumCadmium was discovered by German chemist Friedrich Stromeyer. |
| 1817 | SeleniumSelenium was discovered by Swedish chemists Jöns Jacob Berzelius and Johan Gottlieb Gahn. |
| 1824 | SiliconSilicon was first identified by the French chemist Antoine Lavoisier in 1787. Silicon was re-discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1824. |
| 1825 | AluminiumAluminium was discovered by Danish chemist and physicist Hans Christian Oersted. |
| 1826 | BromineBromine was discovered by two chemists, C. Lowg in Germany and Antoine-Jérôme Balard in France in 1825 and 1826, respectively. |
| 1828 | ThoriumThorium was discovered by Swedish chemist Jöns Jakob Berzelius. |
| 1839 | LanthanumLanthanum was discovered by a Swedish chemist, Carl Gustaf Mosander. |
| 1843 | TerbiumTerbium was discovered by a Swedish chemist, Carl Gustaf Mosander. |
| 1843 | ErbiumErbium was discovered by the Swedish chemist, Carl Gustaf Mosander. |
| 1844 | RutheniumRuthenium was discovered by the Russian scientist Karl Ernst Claus. |
| 1860 | CaesiumCaesium was discovered by German chemists, Robert Wilhelm Bunsen and Gustav Robert Kirchhoff. |
| 1861 | RubidiumRubidium was discovered by German chemists Robert Bunsen and Gustav Kirchhoff. |
| 1861 | ThalliumThallium was discovered by British physicist Sir William Crookes. |
| 1863 | IndiumIndium was discovered by German chemists Ferdinand Reich and Hieronymus Theodor Richter. |
| 1875 | GalliumGallium was discovered by the Paul-Émile Lecoq de Boisbaudran. |
| 1878 | YtterbiumYtterbium was discovered by the Swiss chemist Jean-Charles-Galissard de Marignac. |
| 1878 | HolmiumHolmium was discovered by Marc Delafontaine and Jacques-Louis Soret in 1878 in Switzerland. Later in 1878, a Swedish chemist, Per Teodor Cleve independently discovered the element holmium. |
| 1879 | ThuliumThulium was discovered by Swedish chemist Per Theodor Cleve. |
| 1879 | ScandiumScandium was discovered by Swedish chemist Lars Fredrik Nilson. |
| 1879 | SamariumSamarium was discovered by French chemist, Jean Charles Galissard de Marignac in Switzerland in 1853. It was isolated in France in 1879 by the French chemist Paul-Émile Lecoq de Boisbaudran. |
| 1880 | GadoliniumGadolinium was only discovered by a Swiss chemist called Jean Charles Galissard de Marignac. |
| 1885 | PraseodymiumPraseodymium was discovered by Carl F. Auer von Welsbach, a German chemist. |
| 1885 | NeodymiumNeodymium was discovered by Baron Carl Auer von Welsbach in Vienna, Austria. |
| 1886 | GermaniumGermanium was discovered by German chemist Clemens Alexander Winkler. |
| 1886 | FluorineFluorine was discovered by French chemist Henri Moissan. |
| 1886 | DysprosiumDysprosium was discovered by French chemist Paul-Émile Lecoq de Boisbaudran. |
| 1894 | ArgonArgon was discovered by English chemists Lord Rayleigh and William Ramsav. |
| 1895 | HeliumFrench astronomer Pierre Janssen in 1868 found proof that a new element helium existed in the Sun. Helium was isolated by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve at 1895 in London, England and Uppsala, Sweden. |
| 1898 | KryptonKrypton was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist. |
| 1898 | NeonNeon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist. |
| 1898 | XenonXenon was discovered by Sir William Ramsay, a Scottish chemist, and Morris M. Travers, an English chemist. |
| 1898 | PoloniumPolonium was discovered by French physicists Marie and Pierre Curie. |
| 1898 | RadiumRadium was discovered by French physicists Marie and Pierre Curie. |
| 1899 | ActiniumActinium was discovered by French chemist André-Louis Debierne. |
| 1900 | RadonRadon was discovered by German physicist Friedrich Ernst Dorn. |
| 1901 | EuropiumEuropium was discovered by French chemist Eugène-Anatole Demarçay. |
| 1907 | LutetiumLutetium was independently discovered by French scientist Georges Urbain, Austrian mineralogist Baron Carl Auer von Welsbach, and American chemist Charles James. |
| 1917 | ProtactiniumProtactinium was discovered in 1917/18 by Otto Hahn and Lise Meitner. |
| 1923 | HafniumHafnium was discovered by Dutch physicist Dirk Coster and Hungarian chemist George Charles de Hevesy. |
| 1925 | RheniumRhenium was discovered by the German chemists Ida Tacke-Noddack, Walter Noddack and Otto Carl Berg. |
| 1936 | TechnetiumTechnetium was officially discovered by Italian physicist Emilio Segré and his colleague Carlo Perrier. |
| 1939 | FranciumFrancium was discovered by Marguerite Catherine Perey, a French chemist. |
| 1940 | NeptuniumNeptunium was discovered by Edwin M. McMillan and Philip H. Abelson. |
| 1940 | AstatineAstatine was isolated by Dale R. Corson, Kenneth R. Mackenzie, and Emilio Segré. |
| 1940 | PlutoniumPlutonium was discovered by Glenn Seaborg, Edwin McMillan, Joseph Kennedy, and Arthur Wahl at the University of California, Berkeley. |
| 1944 | AmericiumAmericium was discovered by Glenn Seaborg, Leon Morgan, Ralph James and Albert Ghiorso at the University of California, Berkeley. |
| 1944 | CuriumCurium was discovered by Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso at the University of California, Berkeley. |
| 1945 | PromethiumPromethium was first produced at Oak Ridge National Laboratory in 1945 by Jacob A. Marinsky, Lawrence E. Glendenin and Charles D. Coryell. But its discovery was announced in 1947. |
| 1949 | BerkeliumBerkelium was discovered by Glenn T. Seaborg, Albert Ghiorso, Stanley G. Thompson and Kenneth Street at at the Berkeley Radiation Laboratory. |
| 1950 | CaliforniumCalifornium was discovered by Stanley Thompson, Kenneth Street, Jr., Albert Ghiorso and Glenn T. Seaborg at the University of California at Berkeley. |
| 1952 | EinsteiniumEinsteinium was discovered by Albert Ghiorso and co-workers at Berkeley Laboratories, University of California, USA. |
| 1952 | FermiumFermium was discovered by Albert Ghiorso and co-workers at the University of California at Berkeley. |