1 2 3 4 5
H He Li Be B
Hydrogen Helium Lithium Beryllium Boron
1.008 4.003 6.941 9.012 10.811
6 7 8 9 10
C N O F Ne
Carbon Nitrogen Oxygen Fluorine Neon
12.011 14.007 15.999 18.998 20.180
11 12 13 14 15
Na Mg Al Si P
Sodium Magnesium Aluminum Silicon Phosphorus
22.990 24.305 26.982 28.086 30.974
16 17 18 19 20
S Cl Ar K Ca
Sulfur Chlorine Argon Potassium Calcium
32.066 35.453 39.948 39.098 40.078
21 22 23 24 25
Sc Ti V Cr Mn
Scandium Titanium Vanadium Chromium Manganese
44.956 47.867 50.942 51.996 54.938
26 27 28 29 30
Fe Co Ni Cu Zn
Iron Cobalt Nickel Copper Zinc
55.845 58.933 58.693 63.546 65.38
31 32 33 34 35
Ga Ge As Se Br
Gallium Germanium Arsenic Selenium Bromine
69.723 72.631 74.922 78.971 79.904
36 37 38 39 40
Kr Rb Sr Y Zr
Krypton Rubidium Strontium Yttrium Zirconium
84.798 84.468 87.62 88.906 91.224
41 42 43 44 45
Nb Mo Tc Ru Rh
Niobium Molibdenum Technetium Ruthenium Rhodium
92.906 95.95 98.907 101.07 102.906
46 47 48 49 50
Pd Ag Cd In Sn
Palladium Silver Cadmium Indium Tin
106.42 107.868 112.414 114.818 118.711
51 52 53 54 55
Sb Te I Xe Cs
Antimony Tellurium Iodine Xenon Cesium
121.760 127.6 126.904 131.249 132.905
56 57 58 59 60
Ba La Ce Pr Nd
Barium Lanthanum Cerium Praseodymium Neodymium
137.328 138.905 140.116 140.908 144.243
61 62 63 64 65
Pm Sm Eu Gd Tb
Promethium Samarium Europium Gadolinium Terbium
144.913 150.36 151.964 157.25 158.925
66 67 68 69 70
Dy Ho Er Tm Yb
Dysprosium Holmium Erbium Thulium Ytterbium
162.500 164.930 167.259 168.934 173.055
71 72 73 74 75
Lu Hf Ta W Re
Lutetium Hafnium Tantalum Tungsten Rhenium
174.967 178.49 180.948 183.84 186.207
76 77 78 79 80
Os Ir Pt Au Hg
Osmium Iridium Platinum Gold Mercury
190.23 192.217 195.085 196.967 200.592
81 82 83 84 85
Tl Pb Bi Po At
Thallium Lead Bismuth Polonium Astatine
204.383 207.2 208.980 [208.982] 209.987
86 87 88 89 90
Rn Fr Ra Ac Th
Radon Francium Radium Actinium Thorium
222.018 223.020 226.025 227.028 232.038
91 92 93 94 95
Pa U Np Pu Am
Protactinium Uranium Neptunium Plutonium Americium
231.036 238.029 237.048 244.064 243.061
96 97 98 99 100
Cm Bk Cf Es Fm
Curium Berkelium Californium Einsteinium Fermium
247.070 247.070 251.080 [254] 257.095
101 102 103 104 105
Md No Lr Rf Db
Mendelevium Nobelium Lawrencium Rutherfordium Dubnium
258.1 259.101 [262] [261] [262]
106 107 108 109 110
Sg Bh Hs Mt Ds
Seaborgium Bohrium Hassium Meitnerium Darmstadtium
[266] [264] [269] [268] [269]
111 112 113 114 115
Rg Cn Uut Fl Uup
Roentgenium Copernicium Ununtrium Flerovium Ununpentium
[272] [277] unknown [289] unknown
116 117 118
Lv Uus Uuo
Livermorium Ununseptium Ununoctium
[298] unknown unknown
