H H Hydrogen 1 1.00794 He He Helium 2 4.002602 Li Li Lithium 3 6.941 Be Be Beryllium 4 9.012182 B B Boron 5 10.811 C C Carbon 6 12.0107 N N Nitrogen 7 14.0067 O O Oxygen 8 15.9994 F F Fluorine 9 18.9984032 Ne Ne Neon 10 20.1797 Na Na Sodium 11 22.98976928 Mg Mg Magnesium 12 24.305 Al Al Aluminum 13 26.9815386 Si Si Silicon 14 28.0855 P P Phosphorus 15 30.973762 S S Sulfur 16 32.065 Cl Cl Chlorine 17 35.453 Ar Ar Argon 18 39.948 K K Potassium 19 39.0983 Ca Ca Calcium 20 40.078 Sc Sc Scandium 21 44.955912 Ti Ti Titanium 22 47.867 V V Vanadium 23 50.9415 Cr Cr Chromium 24 51.9961 Mn Mn Manganese 25 54.938045 Fe Fe Iron 26 55.845 Co Co Cobalt 27 58.933195 Ni Ni Nickel 28 58.6934 Cu Cu Copper 29 63.546 Zn Zn Zinc 30 65.38 Ga Ga Gallium 31 69.723 Ge Ge Germanium 32 72.64 As As Arsenic 33 74.9216 Se Se Selenium 34 78.96 Br Br Bromine 35 79.904 Kr Kr Krypton 36 83.798 Rb Rb Rubidium 37 85.4678 Sr Sr Strontium 38 87.62 Y Y Yttrium 39 88.90585 Zr Zr Zirconium 40 91.224 Nb Nb Niobium 41 92.90638 Mo Mo Molybdenum 42 95.96 Tc Tc Technetium 43 (98 Ru Ru Ruthenium 44 101.07 Rh Rh Rhodium 45 102.9055 Pd Pd Palladium 46 106.42 Ag Ag Silver 47 107.8682 Cd Cd Cadmium 48 112.411 In In Indium 49 114.818 Sn Sn Tin 50 118.71 Sb Sb Antimony 51 121.76 Te Te Tellurium 52 127.6 I I Iodine 53 126.90447 Xe Xe Xenon 54 131.293 Cs Cs Cesium 55 132.9054 Ba Ba Barium 56 137.327 La La Lanthanum 57 138.90547 Hf Hf Hafnium 72 178.48 Ta Ta Tantalum 73 180.9488 W W Tungsten 74 183.84 Re Re Rhenium 75 186.207 Os Os Osmium 76 190.23 Ir Ir Iridium 77 192.217 Pt Pt Platinum 78 195.084 Au Au Gold 79 196.966569 Hg Hg Mercury 80 200.59 Tl Tl Thallium 81 204.3833 Pb Pb Lead 82 207.2 Bi Bi Bismuth 83 208.9804 Po Po Polonium 84 209 At At Astatine 85 210 Rn Rn Radon 86 222 Fr Fr Francium 87 223 Ra Ra Radium 88 226 Ac Ac Actinium 89 227 Rf Rf Rutherfordium 104 267 Db Db Dubnium 105 268 Sg Sg Seaborgium 106 271 Bh Bh Bohrium 107 272 Hs Hs Hassium 108 270 Mt Mt Meitnerium 109 276 Ds Ds Darmstadtium 110 281 Rg Rg Roentgenium 111 280 Cn Cn Copernicium 112 285 Nh Nh Nihonium 113 284 Fl Fl Flerovium 114 289 Mc Mc Moscovium 115 288 Lv Lv Livermorium 116 293 Ts Ts Tennessine 117 294 Og Og Oganesson 118 294 Ce Ce Cerium 58 140.116 Pr Pr Praseodymium 59 140.90765 Nd Nd Neodymium 60 144.242 Pm Pm Promethium 61 145 Sm Sm Samarium 62 150.36 Eu Eu Europium 63 151.964 Gd Gd Gadolinium 64 157.25 Tb Tb Terbium 65 158.92535 Dy Dy Dysprosium 66 162.5 Ho Ho Holmium 67 164.93032 Er Er Erbium 68 167.259 Tm Tm Thulium 69 168.93421 Yb Yb Ytterbium 70 173.054 Lu Lu Lutetium 71 174.9668 Th Th Thorium 90 232.03806 Pa Pa Protactinium 91 231.03588 U U Uranium 92 238.02891 Np Np Neptunium 93 237 Pu Pu Plutonium 94 244 Am Am Americium 95 243 Cm Cm Curium 96 247 Bk Bk Berkelium 97 247 Cf Cf Californium 98 251 Es Es Einsteinium 99 252 Fm Fm Fermium 100 257 Md Md Mendelevium 101 258 No No Nobelium 102 259 Lr Lr Lawrencium 103 262