The Datafile PD-CD 4

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6 Atomic number: 3 2 0 Name: 13 1 0 Isolation: 25 1 0 Isolation year: 4 2 0 Symbol: 2 1 1 Atomic weight: 8 2 0 103 1 Hydrogen Cavendish 1766 H 1.008 2 Helium Lockyer 1868 He 4.0026 3 Lithium Arfvedson 1817 Li 6.94 4 Beryllium Vauquelin 1798 Be 9.01218 5 Boron Davy 1807 B 10.81 6 Carbon Prehistoric period C 12.011 7 Nitrogen Rutherford 1772 N 14.0067 8 Oxygen Priestley 1774 O 15.999 9 Fluorine Moissan 1886 F 18.9984 10 Neon Ramsay-Travers 1898 Ne 20.17 11 Sodium Davy 1807 Na 22.9898 12 Magnesium Black-Davy 1808 Mg 24.305 13 Aluminimum Oersted 1825 Al 26.9815 14 Silicon Berzelius 1823 Si 28.086 15 Phosphorus Brand 1669 P 30.9738 16 Sulphur Roman period S 32.06 17 Clorine Scheele 1774 Cl 35.453 18 Argon Ramsay 1894 Ar 39.94 19 Potassium Davy 1807 K 39.1 20 Calcium Davy 1808 Ca 40.08 21 Scandium Nilson 1879 Sc 44.9559 22 Titanium Gregor 1791 Ti 47.9 23 Vanadium Sefstrom 1830 V 50.941 24 Chromium Vauquelin 1798 Cr 51.996 25 Manganese Gahn 1774 Mn 54.938 26 Iron Roman period Fe 55.84 27 Cobalt Brandt 1735 Co 58.9332 28 Nickel Cronstedt 1751 Ni 58.7 29 Copper Roman period Cu 63.54 30 Zinc Medieval period Zn 65.3 31 Gallium de Boisbaudran 1886 Ga 69.72 32 Germanium Winkler 1886 Ge 72.5 33 Arsenic Schroeder 1640 As 74.9216 34 Selenium Berzelius 1817 Se 78.9 35 Bromine Balard 1826 Br 79.904 36 Krypton Ramsay-Travers 1898 Kr 83.8 37 Rubidium Bunsen-Kirchhoff 1861 Rb 85.467 38 Strontium Crawford 1790 Sr 87.62 39 Yttrium Mosander 1843 Y 88.9059 40 Zirconium Klaproth 1787 Zr 91.22 41 Niobium Hatchett 1801 Nb 92.9064 42 Molybdenum Scheele 1778 Mo 95.9 43 Technetium Perrier-Segre' 1937 Tc 98.9062 44 Ruthenium Claus 1845 Ru 101.0 45 Rhodium Wollaston 1803 Rh 102.9055 46 Palladium Wollaston 1804 Pd 106.4 47 Silver Roman period Ag 107.868 48 Cadmium Stromeyer 1817 Cd 112.4 49 Indium Reich-Richter 1863 In 114.82 50 Tin Roman period Sn 118.6 51 Antimony Basilio 1604 Sb 121.7 52 Tellurium Muller von Reichenstein 1782 Te 127.6 53 Iodine Courtois 1811 I 126.9045 54 Xenon Ramsay-Travers 1898 Xe 131.3 55 Caesium Bunsen 1860 Cs 132.9055 56 Barium Davy 1808 Ba 137.3 57 Lanthanum Mosander 1839 La 138.905 58 Cerium Klaproth-Berzelius 1803 Ce 140.12 59 Praseodymium Auer von Welsbach 1885 Pr 140.9077 60 Neodymium Auer von Welsbach 1885 Nd 144.2 61 Promethium Marinsky-Glenderin 1945 Pm 62 Samarium de Boisbaudran 1879 Sm 150.4 63 Europium Demarcay 1896 Eu 151.96 64 Gadolinium Marignac 1880 Gd 157.2 65 Terbium Mosander 1843 Tb 158.9254 66 Dysprosium de Boisbaudran 1886 Dy 162.5 67 Holmium Cleve 1879 Ho 164.9303 68 Erbium Mosander 1843 Er 167.2 69 Thulium Cleve 1878 Tm 168.9342 70 Ytterbium Urbain 1907 Yb 173.0 71 Lutetium Urbain-Auer von Welsbach 1906 Lu 174.97 72 Hafnium Coster-von Hevesy 1922 Hf 178.4 73 Tantalum Ekeberg 1802 Ta 180.94 74 Tungsten Scheele 1781 W 183.8 75 Rhenium Noddack-Tacke-Berg 1925 Re 186.2 76 Osmium Tennant 1804 Os 190.2 77 Iridium Tennant 1804 Ir 192.2 78 Platinum de Ulloa 1735 Pt 195.0 79 Gold Prehistoric period Au 196.9665 80 Mercury Roman period Hg 200.5 81 Thallium Crookes 1861 Tl 204.3 82 Lead Roman period Pb 207.2 83 Bismuth Geoffrey 1753 Bi 208.9806 84 Polonium Curie 1898 Po 85 Astatine Corson-Segre' 1940 At 86 Radon Claus 1844 Rn 87 Francium Perey 1939 Fr 88 Radium Curie-Curie 1898 Ra 226.0254 89 Actinium Debierne 1899 Ac 90 Thorium Berzelius 1828 Th 232.0381 91 Protoactinium Soddy 1918 Pa 231.0359 92 Uranium Klaproth 1789 U 238.029 93 Neptunium McMillan-Abelson 1940 Np 237.0482 94 Plutonium Seaborg-McMillan 1940 Pu 95 Americium Seaborg-James 1944 Am 96 Curium Seaborg-Ghiorso 1944 Cm 97 Berkelium Thompson-Seaborg 1949 Bk 98 Californium Thompson-Seaborg 1950 Cf 99 Einsteinium Seaborg 1952 Es 100 Fermium Seaborg 1953 Fm 101 Mendelevium Ghiorso-Seaborg 1955 Md 102 Nobelium Ghiorso-Seaborg-Sikkeland 1958 No 103 Lawrencium Ghiorso-Sikkeland 1961 Lr