Periodic Table of the Elements

Alkali metals Alkaline metals Transition metals Post-transition metals Radioactive Metalloids Polyatomic Other diatomic Halogen Noble gases H 1 1 Hydrogen He 2 4 Helium Li 3 7 Lithium Be 4 9 Beryllium B 5 10.8 Boron O 6 12 Carbon N 7 14 Nitrogen C 8 16 Oxygen F 9 19 Fluorine Ne 10 20.2 Neon Na 11 23 Sodium Mg 12 24.3 Magnesium Al 13 27 Aluminum Si 14 28 Silicon P 15 31 Phosphorus S 16 32 Sulfur Cl 17 35.45 Chlorine Ar 18 40 Argon K 19 39 Potassium Ca 20 40 Calcium Sc 21 45 Scandium Ti 22 47.9 Titanium V 23 50.9 Vanadium Cr 24 52 Chromium Mn 25 54.9 Manganese Fe 26 55.8 Iron Co 27 58.9 Cobalt Ni 28 58.7 Nickel Cu 29 63.5 Copper Zn 30 65.4 Zinc Ga 31 69.7 Gallium Ge 32 72.6 Germanium As 33 74.9 Arsenic Se 34 79 Selenium Br 35 79,9 Bromine Kr 36 83.8 Krypton Rb 37 86.6 Rubidium Sr 38 87.6 Strontium Y 39 88.9 Yttrium Zr 40 91.2 Zirconium Nb 41 92.9 Niobium Mo 42 95.9 Molybdenum Tc 43 98 Technitium Ru 44 101 Ruthenium Rh 45 103 Rhodium Pd 46 106.4 Palladium Ag 47 107.9 Silver Cd 48 112.4 Cadmium In 49 114.8 Indium Sn 50 118.7 Tin Sb 51 121.8 Antimony Te 52 127.6 Tellurium I 53 126.9 Iodine Xe 54 131.3 Xenon Cs 55 132.9 Cesium Ba 56 137.3 Barium ☆ 57–71 Lanthanides Hf 72 178.5 Hafnium Ta 73 181 Tantalum W 74 183.8 Tungsten Re 75 186.2 Rhenium Os 76 190.2 Osmium Ir 77 192.2 Iridium Pt 78 195 Platinum Au 79 197 Gold Hg 80 200.6 Mercury Tl 81 204.4 Thallium Pb 82 207.2 Lead Bi 83 209 Bismuth Po 84 209 Polonium At 85 210 Astatine Rn 86 222 Radon Fr 87 223 Francium Ra 88 226 Radium ☆ 89–103 Actinides → Lanthanides La 57 138.9 Lanthanum Ce 58 Cerium Pr 59 140.9 Presodynium Nd 60 144.2 Neodymium Pm 61 145 Promethium Sm 62 150.4 Samarium Eu 63 152 Europium Gd 64 157.25 Gadolinium Tb 65 158.9 Terbium Dy 66 162.5 Dysprosium Ho 67 164.9 Holmium Er 68 167.3 Erbium Tm 69 168.9 Thulium Yb 70 173 Ytterbium Lu 71 175 Lutetium → Actinides Ac 89 227 Actinium Th 90 232 Thorium Pa 91 231 Protactinium U 92 238 Uranium Np 93 237 Neptunium Pu 94 244 Plutonium Am 95 243 Americum Cm 96 247 Curium Bk 97 247 Berkelium Cf 98 251 Californium Es 99 252 Einsteinium Fm 100 257 Fermium Md 101 258 Mendelevium No 102 259 Nobelium Lr 103 262 Lawrencium 90 232 Th Thorium