1 2 3 Nonmetal H Noble Gas He Alkali Metal 1.008 4.003 6.941 Hydrogen Helium Lithium 4 5 6 Alkaline Earth Semimetal Nonmetal 9.012 10.811 12.011 Beryllium Boron Carbon Be B Li C 7 8 9 Nonmetal Nonmetal Halogen 14.007 15.999 18.998 Nitrogen Oxygen Fluorine 10 11 12 Noble Gas Alkali Metal Alkaline Earth N O F Ne Na Mg 20.180 22.990 24.305 Neon Sodium Magnesium 13 14 15 Basic Metal Semimetal Nonmetal 26.982 28.086 30.974 Aluminum Silicon Phosphorus 16 17 18 Nonmetal Halogen Noble Gas 32.066 35.453 39.948 Sulfur Chlorine Argon Al S Si Cl P Ar 19 20 21 Alkali Metal Alkaline Earth Transition Metal 39.098 40.078 44.956 Potassium Calcium Scandium 22 23 24 Transition Metal Transition Metal Transition Metal 47.88 50.942 51.996 Titanium Vanadium Chromium K Ti Ca V Sc Cr 25 26 27 Transition Metal Transition Metal Transition Metal 54.938 55.845 58.933 Manganese Iron Cobalt 28 29 30 Transition Metal Transition Metal Transition Metal 58.693 63.546 65.38 Nickel Copper Zinc Mn Ni Fe Cu Co Zn 31 32 33 Basic Metal Ga Semimetal Ge Semimetal 69.723 72.631 74.922 Gallium Germanium Arsenic 34 35 36 Nonmetal Se Halogen Br Noble Gas 78.971 79.904 83.798 Selenium Bromine Krypton As Kr 37 38 39 Alkali Metal Alkaline Earth Transition Metal 85.468 87.62 88.906 Rubidium Strontium Yttrium 40 41 42 Transition Metal Transition Metal Transition Metal 91.224 92.906 95.95 Zirconium Niobium Molybdenum Rb Zr Sr Nb Y Mo 43 44 45 Transition Metal Transition Metal Transition Metal 98.907 101.07 102.906 Technetium Ruthenium Rhodium 46 47 48 Transition Metal Transition Metal Transition Metal 106.42 107.868 112.414 Palladium Silver Cadmium Tc Pd Ru Ag Rh Cd 49 50 51 Basic Metal Basic Metal Sn Semimetal Sb 114.818 118.711 121.760 Indium Tin Antimony 52 53 54 Semimetal Halogen I Noble Gas Xe 127.6 126.904 131.294 Tellurium Iodine Xenon In Te 55 56 57 Alkali Metal Alkaline Earth Lanthanide 132.905 137.328 138.905 Cesium Barium Lanthanum 58 59 60 Lanthanide Lanthanide Pr Lanthanide Nd 140.116 140.908 144.243 Cerium Praseodymium Neodymium Cs Ce Ba La 61 62 63 Lanthanide Pm Lanthanide Sm Lanthanide 144.913 150.36 151.964 Promethium Samarium Europium 64 65 66 Lanthanide Lanthanide Tb Lanthanide Dy 157.25 158.925 162.500 Gadolinium Terbium Dysprosium Gd Eu 67 68 69 Lanthanide Lanthanide Er Lanthanide Tm 164.930 167.259 168.934 Holmium Erbium Thulium 70 71 72 Lanthanide Lanthanide Transition Metal 173.055 174.967 178.49 Ytterbium Lutetium Hafnium Ho Yb Lu Hf 73 74 75 Transition Metal Transition Metal Transition Metal 180.948 183.85 186.207 Tantalum Tungsten Rhenium 76 77 78 Transition Metal Transition Metal Transition Metal 190.23 192.22 195.08 Osmium Iridium Platinum Ta Os W Ir Re Pt 79 80 81 Transition Metal Transition Metal Basic Metal 196.967 200.59 204.383 Gold Mercury Thallium 82 83 84 Basic Metal Basic Metal Bi Semimetal Po 207.2 208.980 [208.982] Lead Bismuth Polonium Au Pb Hg Tl 85 86 87 Halogen At Noble Gas Rn Alkali Metal 209.987 222.018 223.020 Astatine Radon Francium 88 89 90 Alkaline Earth Actinide Actinide Fr Ra Ac Th 226.025 227.028 232.038 Radium Actinium Thorium 91 92 93 Actinide Actinide U Actinide Np 231.036 238.029 237.048 Protactinium Uranium Neptunium 94 95 96 Actinide Actinide Actinide Pa Pu Am Cm 244.064 243.061 247.070 Plutonium Americium Curium 97 98 99 Actinide Actinide Actinide Bk Cf Es 247.070 251.080 [254] Berkelium Californium Einsteinium 100 101 102 Actinide Actinide Actinide Fm Md No 257.095 258.1 259.101 Fermium Mendelevium Nobelium 103 104 105 Actinide Transition Metal Transition Metal [262] [261] [262] Lawrencium Rutherfordium Dubnium 106 107 108 Transition Metal Transition Metal Transition Metal [266] [264] [269] Seaborgium Bohrium Hassium Lr Sg Rf Bh Db Hs 109 110 111 Transition Metal Transition Metal Transition Metal [278] [281] [280] Meitnerium Darmstadtium Roentgenium 112 113 114 Transition Metal Cn Basic Metal Nh Basic Metal [285] [286] [289] Copernicium Nihonium Flerovium Mt Ds Rg Fl 115 116 117 Basic Metal Basic Metal Lv Halogen Ts [289] [293] [294] Moscovium Livermorium Tennessine Mc 118 Noble Gas Og [294] Oganesson