VA_Periodic_table_elements 05/12/11 4:15 PM Page 1

Periodic Table of the Elements

Atomic mass 28.0855
Group
1
Symbol
Si
1.00794
Atomic number 14 4.00260

1 H Name Silicon He
1 2
Hydrogen Helium

1 2 13 14 15 16 17 18
6.941 9.01218 10.81 12.0111 14.0067 15.9994 18.998403 20.179

2 Li Be B C N O F Ne
3 4 Transition Elements 5 6 7 8 9 10
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
22.98977 24.305 26.98154 28.0855 30.97376 32.06 35.453 39.948

3 Na Mg Al Si P S Cl Ar
11 12 13 14 15 16 17 18
Sodium Magnesium 3 4 5 6 7 8 9 10 11 12 Aluminum Silicon Phosphorus Sulfur Chlorine Argon
Period

39.0983 40.08 44.9559 47.88 50.9415 51.996 54.9380 55.847 58.9332 58.69 63.546 65.39 69.72 72.59 74.9216 78.96 79.904 83.80

4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
85.4678 87.62 88.9059 91.224 92.9064 95.94 (98) 101.07 102.906 106.42 107.868 112.41 114.82 118.71 121.75 127.60 126.905 131.29

5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
132.905 137.33 138.906 178.49 180.948 183.85 186.207 190.2 192.22 195.08 196.967 200.59 204.383 207.2 208.980 (209) (210) (222)

6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
Cesium Barium Lanthanum Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
(223) 226.025 227.028 (261) (262) (263) (262) (265) (266?) (269?)
Mass numbers in parentheses are those of
7 Fr Ra Ac Rf Db Sg Bh Hs Mt the most stable or most common isotope. Metals Nonmetals
87 88 89 104 105 106 107 108 109 110
Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium

140.12 140.908 144.24 (145) 150.36 151.96 157.25 158.925 162.50 164.930 167.26 168.934 173.04 174.967

Lanthanoid Series Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
58 59 60 61 62 63 64 65 66 67 68 69 70 71
Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium
232.038 231.036 238.029 237.048 (244) (243) (247) (247) (251) (252) (257) (258) (259) (260)

Actinoid Series Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
90 91 92 93 94 95 96 97 98 99 100 101 102 103
Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium

Revised February 2023

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