o H Hydrogen 1.008 3 +1 Li Lithium 6.941 +1 37 11 12 Na Mg Sodium Magnesium 22.990 24.305 19 +120 +2 K Potassium 39.098 87 Be Beryllium 9.012 +2 Rb Sr Rubidium 85.468 Strontium 87.62 55 +56 Cs Caesium 132 905 Fr Francium 223.020 21 22 Ca Sc Ti Calcium 40.078 Scandium 44.956 Titanium 47.867 +138 +2 39 +3 40 Y Yttrium 88.906 +1 88 +2 Ba Barium 137.328 METALS ALKALI METAL ALKALINE EARTH METAL TRANSITION METAL LANTHANIDES ACTINIDES OTHER METAL Ra Radium 226.025 +3 Lanthanides 57 - 71 **Actinides: 89-103 +2 23 +3 +4 72 +4 Hf Hafnium 178.49 V Vanadium 50.942 +3 41 +3 42 +5 *LANTHANIDES La Lanthanium 138.905 73 +4 +5 57 +3 58 **ACTINIDES Ac Actinium 227.028 44 Zr Nb Mo Tc Tc Ru Zirconium 91.224 Niobium Molybdenum Technetium 95.95 98.907 Ruthenium 101.07 92.906 Ta Tantalum 180.948 89 +3 90 104 +4 105 +5 106 Rf Db Rutherfordiur (261) Dubnium (262) SEMIMETALS SEMIMETAL NONMETALS +3 +4 Ce Cerium 140.116 +5 74 +6 75 W Tungsten 183.84 OTHER NONMETAL HALOGEN NOBLE GAS 24 +2 25 +327 Cr Mn Fe Co Chromium 51.996 Manganese 54