Alkali Metals Alkaline Earth Metals Lanthanoids Actinides Transition Metals Post-Transition Metals Metalloids Other Nonmetals Noble Gases Unknown
1 1 H Hydrogen 1.008 2 2 He Helium 4.0026 3 2 1 Li Lithium 6.94 4 2 2 Be Beryllium 9.0122 5 2 3 B Boron 10.81 6 2 4 C Carbon 12.011 7 2 5 N Nitrogen 14.007 8 2 6 O Oxygen 15.999 9 2 7 F Fluorine 18.998 10 2 8 Ne Neon 20.18 11 2 8 1 Na Sodium 22.99 12 2 8 2 Mg Magnesium 24.305 13 2 8 3 Al Aluminium 26.982 14 2 8 4 Si Silicon 28.085 15 2 8 5 P Phosphorus 30.974 16 2 8 6 S Sulfur 32.06 17 2 8 7 Cl Chlorine 35.45 18 2 8 8 Ar Argon 39.948 19 2 8 8 1 K Potassium 39.098 20 2 8 8 2 Ca Calcium 40.078 21 2 8 9 2 Sc Scandium 44.956 22 2 8 10 2 Ti Titanium 47.867 23 2 8 11 2 V Vanadium 50.942 24 2 8 13 1 Cr Chromium 51.996 25 2 8 13 2 Mn Manganese 54.938 26 2 8 14 2 Fe Iron 55.845 27 2 8 15 2 Co Cobalt 58.933 28 2 8 16 2 Ni Nickel 58.693 29 2 8 18 1 Cu Copper 63.546 30 2 8 18 2 Zn Zinc 65.38 31 2 8 18 3 Ga Gallium 69.723 32 2 8 18 4 Ge Germanium 72.63 33 2 8 18 5 As Arsenic 74.922 34 2 8 18 6 Se Selenium 78.971 35 2 8 18 7 Br Bromine 79.904 36 2 8 18 8 Kr Krypton 83.798 37 2 8 18 8 1 Rb Rubidium 85.468 38 2 8 18 8 2 Sr Strontium 87.62 39 2 8 18 9 2 Y Yttrium 88.906 40 2 8 18 10 2 Zr Zirconium 91.224 41 2 8 18 12 1 Nb Niobium 92.906 42 2 8 18 13 1 Mo Molybdenum 95.95 43 2 8 18 13 2 Tc Technetium (98) 44 2 8 18 15 1 Ru Ruthenium 101.07 45 2 8 18 16 1 Rh Rhodium 102.91 46 2 8 18 18 Pd Palladium 106.42 47 2 8 18 18 1 Ag Silver 107.87 48 2 8 18 18 2 Cd Cadmium 112.41 49 2 8 18 18 3 In Indium 114.82 50 2 8 18 18 4 Sn Tin 118.71 51 2 8 18 18 5 Sb Antimony 121.76 52 2 8 18 18 6 Te Tellurium 127.6 53 2 8 18 18 7 I Iodine 126.9 54 2 8 18 18 8 Xe Xenon 131.29 55 2 8 18 18 8 1 Cs Caesium 132.91 56 2 8 18 18 8 2 Ba Barium 137.33 57 2 8 18 18 9 2 La Lanthanum 138.91 58 2 8 18 19 9 2 Ce Cerium 140.12 59 2 8 18 21 8 2 Pr Praseodymium 140.91 60 2 8 18 22 8 2 Nd Neodymium 144.24 61 2 8 18 23 8 2 Pm Promethium 145 62 2 8 18 24 8 2 Sm Samarium 150.36 63 2 8 18 25 8 2 Eu Europium 151.96 64 2 8 18 25 9 2 Gd Gadolinium 157.25 65 2 8 18 27 8 2 Tb Terbium 158.93 66 2 8 18 28 8 2 Dy Dysprosium 162.5 67 2 8 18 29 8 2 Ho Holmium 164.93 68 2 8 18 30 8 2 Er Erbium 167.26 69 2 8 18 31 8 2 Tm Thulium 168.93 70 2 8 18 32 8 2 Yb Ytterbium 173.05 71 2 8 18 32 9 2 Lu Lutetium 174.97 72 2 8 18 32 10 2 Hf Hafnium 178.49 73 2 8 18 32 11 2 Ta Tantalum 180.95 74 2 8 18 32 12 2 W Tungsten 183.84 75 2 8 18 32 13 2 Re Rhenium 186.21 76 2 8 18 32 14 2 Os Osmium 190.23 77 2 8 18 32 15 2 Ir Iridium 192.22 78 2 8 18 32 17 1 Pt Platinum 195.08 79 2 8 18 32 18 1 Au Gold 196.97 80 2 8 18 32 18 2 Hg Mercury 200.59 81 2 8 18 32 18 3 Tl Thallium 204.38 82 2 8 18 32 18 4 Pb Lead 207.2 83 2 8 18 32 18 5 Bi Bismuth 208.98 84 2 8 18 32 18 6 Po Polonium (209) 85 2 8 18 32 18 7 At Astatine (210) 86 2 8 18 32 18 8 Rn Radon (222) 87 2 8 18 32 18 8 1 Fr Francium (223) 88 2 8 18 32 18 8 2 Ra Radium (226) 89 2 8 18 32 18 9 2 Ac Actinium (227) 90 2 8 18 32 18 10 2 Th Thorium 232.04 91 2 8 18 32 20 9 2 Pa Protactinium 231.04 92 2 8 18 32 21 9 2 U Uranium 238.03 93 2 8 18 32 22 9 2 Np Neptunium (237) 94 2 8 18 32 24 8 2 Pu Plutonium (244) 95 2 8 18 32 25 8 2 Am Americium (243) 96 2 8 18 32 25 9 2 Cm Curium (247) 97 2 8 18 32 27 8 2 Bk Berkelium (247) 98 2 8 18 32 28 8 2 Cf Californium (251) 99 2 8 18 32 29 8 2 Es Einsteinium (252) 100 2 8 18 32 30 8 2 Fm Fermium (257) 101 2 8 18 32 31 8 2 Md Mendelevium (258) 102 2 8 18 32 32 8 2 No Nobelium (259) 103 2 8 18 32 32 9 2 Lr Lawrencium (266) 104 2 8 18 32 32 10 2 Rf Rutherfordium (267) 105 2 8 18 32 32 11 2 Db Dubnium (268) 106 2 8 18 32 32 12 2 Sg Seaborgium (269) 107 2 8 18 32 32 13 2 Bh Bohrium (270) 108 2 8 18 32 32 14 2 Hs Hassium (277) 109 2 8 18 32 32 15 2 Mt Meitnerium (278) 110 2 8 18 32 32 16 2 Ds Darmstadtium (281) 111 2 8 18 32 32 17 2 Rg Roentgenium (282) 112 2 8 18 32 32 18 2 Cn Copernicium (282) 113 2 8 18 32 32 18 3 Nh Nihonium (286) 114 2 8 18 32 32 18 4 Fl Flerovium (289) 115 2 8 18 32 32 18 5 Mc Moscovium (290) 116 2 8 18 32 32 18 6 Lv Livermorium (293) 117 2 8 18 32 32 18 7 Ts Tennessine (294) 118 2 8 18 32 32 18 8 Og Oganesson (294) Element names, masses, and places are from Mike Golus’s periodic table (2019), used under the MIT License. Copyright (c) 2019 Mike Golus. Permission is granted to use, copy, and share that work, including for sale, if this notice stays with it. The software is provided as is, without warranty.