2 8 18 32 9 2 2 8 18 32 8 2 2 8 18 31 8 2 2 8 18 30 8 2 2 8 18 29 8 2 2 8 18 28 8 2 2 8 18 27 8 2 2 8 18 25 9 2 2 8 18 25 8 2 2 8 18 24 8 2 2 8 18 23 8 2 2 8 18 22 8 2 2 8 18 21 8 2 2 8 18 19 9 2 2 8 18 18 9 2 2 8 18 32 32 8 3 2 8 18 32 32 8 2 2 8 18 32 31 8 2 2 8 18 32 30 8 2 2 8 18 32 29 8 2 2 8 18 32 28 8 2 2 8 18 32 27 8 2 2 8 18 32 25 9 2 2 8 18 32 25 8 2 2 8 18 32 24 8 2 2 8 18 32 22 9 2 2 8 18 32 21 9 2 2 8 18 32 20 9 2 2 8 18 32 18 10 2 2 8 18 32 18 9 2 2 8 18 32 32 18 8 2 8 18 32 32 18 7 2 8 18 32 32 18 6 2 8 18 32 32 18 5 2 8 18 32 32 18 4 2 8 18 32 32 18 3 2 8 18 32 32 18 2 2 8 18 32 32 17 2 2 8 18 32 18 8 2 2 8 18 32 18 8 1 2 8 18 32 32 15 2 2 8 18 32 32 14 2 2 8 18 32 32 13 2 2 8 18 32 32 12 2 2 8 18 32 32 11 2 2 8 18 32 32 16 2 2 8 18 32 32 10 2 2 8 18 32 18 8 2 8 18 32 18 7 2 8 18 32 18 6 2 8 18 32 18 5 2 8 18 32 18 4 2 8 18 32 18 3 2 8 18 32 18 2 2 8 18 32 18 1 2 8 18 18 8 2 2 8 18 18 8 1 2 8 18 32 15 2 2 8 18 32 14 2 2 8 18 32 13 2 2 8 18 32 12 2 2 8 18 32 11 2 2 8 18 32 17 1 2 8 18 32 10 2 2 8 18 18 8 2 8 18 18 7 2 8 18 18 6 2 8 18 18 5 2 8 18 18 4 2 8 18 18 3 2 8 18 18 2 2 8 18 18 1 2 8 18 9 2 2 8 18 8 2 2 8 18 8 1 2 8 18 16 1 2 8 18 15 1 2 8 18 13 2 2 8 18 13 1 2 8 18 12 1 2 8 18 18 2 8 18 10 2 2 8 18 8 2 8 18 7 2 8 18 6 2 8 18 5 2 8 18 4 2 8 18 3 2 8 18 2 2 8 18 1 2 8 9 2 2 8 8 2 2 8 8 1 2 8 15 2 2 8 14 2 2 8 13 2 2 8 13 1 2 8 11 2 2 8 16 2 2 8 10 2 2 8 8 2 8 7 2 8 6 2 8 5 2 8 4 2 8 3 2 8 2 2 8 1 2 8 2 2 7 2 6 2 5 2 4 2 3 2 2 2 1 1 +1 -1 0 +1 +1 +1 +1 +1 +1 +2 +2 +2 +2 +2 +2 +3 +3 +4 +4 +4 +4 +5 +5 +5 +5 +6 +3 +6 +4 +6 +4 +6 +7 +4 +2 +7 +4 +4 +7 +6 +3 +2 +4 +3 +4 +8 +2 +3 +4 +3 +2 +4 +2 +4 +2 +2 +1 +3 +2 +1 +3 +1 +2 +1 +2 +1 +2 +3 +3 +3 +3 +3 +1 +4 +2 -4 +4 -4 +4 +2 -4 +4 +2 -4 +4 +2 +5 +3 -3 +5 +3 -3 +5 +3 -3 +5 +3 -3 +3 -2 +6 +4 +2 -2 +6 +4 +2 -2 +6 +4 +2 -2 +4 +2 -2 -1 +7 +5 +3 +1 -1 +5 +3 +1 -1 +7 +5 +3 +1 -1 +1 -1 0 0 +2 0 +6 +4 +2 0 +2 0 +3 +4 +3 +3 +3 +3 +3 +3 +2 +3 +3 +3 +3 +3 +3 +3 +3 +3 +4 +5 +6 +5 +4 +3 +3 +3 +3 +3 +3 +3 +2 +3 [281] [280] [285] [286] [289] [289] [293] [294] [294] [278] [269] [264] [266] [262] [261] 226.025 223.020 162.500 164.930 167.259 168.934 173.055 174.967 158.925 157.25 151.964 150.36 144.913 144.243 140.908 140.116 138.905 251.080 [254] 257.095 258.1 259.101 [262] 247.070 247.070 243.061 244.064 237.048 238.029 231.036 232.038 227.028 195.085 196.967 200.592 204.383 207.2 208.980 [208.982] 209.987 222.018 192.217 190.23 186.207 183.84 180.948 178.49 137.328 132.905 106.42 107.868 112.414 114.818 118.711 121.760 127.6 126.904 131.293 102.906 101.07 98.907 95.95 92.906 91.224 88.906 87.62 85.468 58.693 63.546 65.38 69.723 72.631 74.922 78.971 79.904 83.798 26.982 28.086 30.974 32.066 35.453 39.948 10.811 12.011 14.007 15.999 18.998 20.180 4.003 58.933 55.845 54.938 51.996 50.942 47.867 44.956 40.078 39.098 24.305 22.990 9.012 6.941 1.008 Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Meitnerium Hassium Bohrium Seaborgium Dubnium Rutherfordium Actinoids Radium Francium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Terbium Gadolinium Europium Samarium Promethium Neodymium Praseodymium Cerium Lanthanum Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Berkelium Curium Americium Plutonium Neptunium Uranium Protactinium Thorium Actinium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon Iridium Osmium Rhenium Tungsten Tantalum Hafnium Lanthanoids Barium Cesium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Rhodium Ruthenium Technetium Molybdenum Niobium Zirconium Yttrium Strontium Rubidium Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Aluminum Silicon Phosphorus Sulfur Chlorine Argon Boron Carbon Nitrogen Oxygen Fluorine Neon Helium Cobalt Iron Manganese Chromium Vanadium Titanium Scandium Calcium Potassium Magnesium Sodium Beryllium Lithium Hydrogen H Li Na K Rb Cs Fr He Ne Ar Kr Xe Rn Og Be Mg Ca Sr Ba Ra B Al Ga In Tl Nh C Si Ge Sn Pb Fl N P As Sb Bi Mc O S Se Te Po Lv F Cl Br I At Ts Sc Y Ti Zr Hf Rf V Nb Ta Db Cr Mo W Sg Mn Tc Re Bh Fe Ru Os Hs Co Rh Ir Mt Ni Pd Pt Ds Cu Ag Au Rg Zn Cd Hg Cn La Ce Tm Yb Lu Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Ac Th Md No Lr Pa U Np Pu Am Cm Bk Cf Es Fm 114 115 116 117 118 1 3 4 11 12 19 20 21 22 23 24 25 26 27 28 29 30 31 13 5 32 14 6 33 15 7 34 16 8 35 17 9 36 18 10 2 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57-71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89-103 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 IA IIA IIIB IVB VB VIB VIIB VIIIB IB IIB IIIA IVA VA VIA VIIA VIIIA 1 2 3 4 5 6 7 PERIODIC TABLE OF THE ELEMENTS ©2019 sciencenotes.org Lanthanoids Actinoids 1 K 2 2 2 L 8 2 6 3 M 18 2 6 10 4 N 32 2 6 10 14 5 O 32 2 6 10 14 6 P 18 2 6 10 7 Q 8 2 6 8 R 2 2 Energy Level ELECTRON SHELLS Shell Name Max. Electrons s p d f 2 8 18 32 18 1 +3 +1 196.967 Gold Au 79 11 IB Group (IUPAC) Group (CAS) Atomic Number Symbol Name Atomic Mass Electron Shell Configuration Oxidation States