IA VIIIA
1 2
1 H       The Periodic Table of the Elements He
Hydrogen Helium
1.00797 IIA IIIA IVA VA VIA VIIA 4.00260
3 4 6 Atomic Number 5 6 7 8 9 10
2 Li Be C Symbol B C N O F Ne
Lithium Beryllium Carbon Name Boron Carbon Nitrogen Oxygen Fluorine Neon
6.941 9.01218 12.011 Atomic Weight  [ ( ) indicates most stable or best known isotope] 10.81 12.011 14.0067 15.9994 18.998403 20.179
11 12 13 14 15 16 17 18
3 Na Mg Al Si P S Cl Ar
Sodium Magnesium Aluminum Silicon Phosphorus Sulfur Chlorine Argon
22.98977 24.305 IIIB IVB VB VIB VIIB VIII IB IIB 26.98154 28.0855 30.97376 32.06 35.453 39.948
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
39.0983 40.08 44.9559 47.90 50.9415 51.996 54.9380 55.847 58.9332 58.70 63.546 65.38 69.72 72.59 74.9216 78.96 79.904 83.80
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
85.4678 87.62 88.9059 91.22 92.9064 95.94 (98) 101.07 102.9055 106.4 107.868 112.41 114.82 118.69 121.75 127.60 126.9045 131.30
55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Cesium Barium Lanthanum Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
132.9054 137.33 138.9055 178.49 180.9479 183.85 186.207 190.2 192.22 195.09 196.9665 200.59 204.37 207.2 208.9804 (209) (210) (222)
87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
7 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Uub Uuq
Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Ununbiium   Ununquadium        
(223) 226.0254 227.0278 (261) (262) (263) (262) (255) (256) (269) (272) (277)            
  58 59 60 61 62 63 64 65 66 67 68 69 70 71
Lanthanides Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
  Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium
  140.12 140.9077 144.24 (145) 150.4 151.96 157.25 158.9254 162.50 164.9304 167.26 168.9342 173.04 174.967
  90 91 92 93 94 95 96 97 98 99 100 101 102 103
Actinides Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
  Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium
  232.0381 231.0359 238.029 237.0482 (242) (243) (247) (247) (251) (252) (257) (258) (259) (260)