1 Discoverers of Periodic Elements 2 H He 3 4 5 6 7 8 9 10 Alkali Transition Metalloid metal metal Noble gas Li Be B C N O F Ne 11 12 Alkaline Post-transition Lanthanide Unknown Reactive 13 14 15 16 17 18 earth metal metal properties Na Mg Al Si P S Cl Ar 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 37 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 55 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn 87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Pa U Np Pu Am Cm Bk Cf Es Md No Lr

1 Henry Cavendish 30 Unknown 56 Sir 80 Unknown 99 Albert Ghiorso et al. 2 Pierre Janssen and Norman Lockyer 31 Paul-Émile Lecoq de Boisbaudran 57 Carl Gustaf Mosander 81 Sir 100 Albert Ghiorso et al. 3 Johan August Arfwedson 32 Clemens Alexander Winkler 58 Jöns Jacob Berzelius and Wilhem 82 Unknown 101 Albert Ghiorso, Bernard G. Harvey, Hisinger Gregory Robert Choppin, Stanley 4 Louis Nicolas Vauquelin 33 Zosimos of Panopolis 83 Claude François Geoffroy Gerald Thompson, Glenn 59 Carl Auer von Welsbach and Theodore Seaborg 5 Joseph Louis Gay-Lussac and Louis 34 Jöns Jacob Berzelius and Johan 84 Marie and Pierre Curie 60 Carl Auer von Welsbach Jacques Thénard Gottlieb Gahn 102 E. D. Donets, V. A. Shchegolev, and Dale R. Corson, Kenneth Ross 6 Unknown Chien-Shiung Wu, Emilio Segrè, 85 V. A. Ermakov 35 Carl Jacob Löwig and Antoine Jérôme 61 MacKenzie, and Emilio Segrè Balard and Hans Bethe 7 Daniel Rutherford 103 Albert Ghiorso, Torbjørn Sikkeland, 86 and Robert Bowie Almon E. Larsh, and Robert M. 36 William Ramsey and Morris William 62 Paul-Émile Lecoq de Boisbaudran Owens Latimer 8 Carl Wilhelm Scheele Travers 63 Eugène-Anatole Demarçay 87 Marguerite Perey 104 Albert Ghiorso et al. 9 André-Marie Ampère 37 Robert Wilhelm Eberhard Bunsen and Gustav Kirchhoff 64 Jean Charles Galissard de Marignac Marie and Pierre Curie 105 Albert Ghiorso et al. 10 William Ramsey and Morris William 88 38 William Cruickshank Travers 65 Carl Gustaf Mosander 89 Friedrich Oskar Giese 106 Albert Ghiorso et al. 11 Sir Humphry Davy 39 Johan Gadolin 66 Paul-Émile Lecoq de Boisbaudran 90 Jöns Jacob Berzelius 107 Gottfried Münzenberg et al. 12 Joseph Black 40 Martin Heinrich Klaproth 67 Jacques-Louis Soret and Marc 91 Kazimierz Fajans and Oswald 108 Gottfried Münzenberg and Peter Delafontaine Helmuth Göhring 13 Hans Christian Ørsted 41 Armbruster et al. Martin Heinrich Klaproth 68 Carl Gustaf Mosander 92 Gottfried Münzenberg and Peter 14 Jöns Jacob Berzelius 42 Carl Wilhelm Scheele 109 Armbruster et al. 69 Per Teodor Cleve 93 Edwin McMillan and Philip Abelson 15 Hennig Brand 43 Emilio Segrè and Carlo Perrier Glenn Theodore Seaborg, Arthur 110 Sigurd Hofmann et al. Jean Charles Galissard de Marignac 94 16 Unknown 70 Charles Wahl, Joseph William 44 Karl Ernst Claus 111 Sigurd Hofmann et al. Kennedy, and Edwin Mattison Carl Wilhelm Scheele 71 Carl Auer von Welsbach 17 45 William Hyde Wollaston McMillan 112 Sigurd Hofmann et al. John William Strutt and William 72 Dirk Coster and George de Hevesy 95 Glenn Theodore Seaborg, Ralph 18 46 William Hyde Wollaston 113 Yuri Tsolakovich Oganessian et al. Ramsay Arthur James, Leon O. Morgan, and 73 and Kōsuke Morita et al. 19 Sir Humphry Davy 47 Unknown Albert Ghiorso Yuri Tsolakovich Oganessian al. 74 Carl Wilhelm Scheele 96 Glenn Theodore Seaborg, Ralph 114 et Sir Humphry Davy 48 Karl Samuel Leberecht Hermann, 20 Arthur James, and Albert Ghiorso Friedrich Stromeyer, and Johann 75 Masataka Ogawa 115 Yuri Tsolakovich Oganessian et al. 21 Lars Fredrik Nilson Christoff Heinrich Roloff 97 Stanley Gerald Thompson, Albert 116 Yuri Tsolakovich Oganessian al. 76 et 22 Ferdinand Reich and Hieronymous Ghiorso, and Glenn Theodore 49 Seaborg Theodor Richter 77 Smithson Tennant 117 Yuri Tsolakovich Oganessian et al. 23 Andrés Manuel del Río Fernández 50 Unknown 98 Stanley Gerald Thompson, Kenneth 118 Yuri Tsolakovich Oganessian et al. 78 Charles Wood Street Jr., Albert Ghiorso, and Glenn 24 Louis Nicolas Vauquelin 51 Pliny the Elder Theodore Seaborg 79 Unknown 25 Carl Wilhelm Scheele 52 Franz-Joseph Müller von Reichenstein 26 Unknown 53 Bernard Courtois Sources: 27 Georg Brandt 54 William Ramsey and Morris William https://en.wikipedia.org/wiki/Timeline_of_chemical_element_discoveries 28 Travers https://www.azom.com/article.aspx?ArticleID=6101 Axel Fredrik Cronstedt https://en.wikipedia.org/wiki/Timeline_of_materials_technology 55 Robert Wilhelm Eberhard Bunsen https://www.preceden.com/timelines/303436-the-discovery-of-metals-and-alloys 29 Unknown and Gustav Kirchhoff