| Number | Element | Valence | | 1 | Hydrogen | (-1), +1 | | 2 | Helium | 0 | | 3 | Lithium | +1 | | 4 | Beryllium | +2 | | 5 | Boron | -3, +3 | | 6 | Carbon | (+2), +4 | | 7 | Nitrogen | -3, -2, -1, (+1), +2, +3, +4, +5 | | 8 | Oxygen | -2 | | 9 | Fluorine | -1, (+1) | | 10 | Neon | 0 | | 11 | Sodium | +1 | | 12 | Magnesium | +2 | | 13 | Aluminum | +3 | | 14 | Silicon | -4, (+2), +4 | | 15 | Phosphorus | -3, +1, +3, +5 | | 16 | Sulfur | -2, +2, +4, +6 | | 17 | Chlorine | -1, +1, (+2), +3, (+4), +5, +7 | | 18 | Argon | 0 | | 19 | Potassium | +1 | | 20 | Calcium | +2 | | 21 | Scandium | +3 | | 22 | Titanium | +2, +3, +4 | | 23 | Vanadium | +2, +3, +4, +5 | | 24 | Chromium | +2, +3, +6 | | 25 | Manganese | +2, (+3), +4, (+6), +7 | | 26 | Iron | +2, +3, (+4), (+6) | | 27 | Cobalt | +2, +3, (+4) | | 28 | Nickel | (+1), +2, (+3), (+4) | | 29 | Copper | +1, +2, (+3) | | 30 | Zinc | +2 | | 31 | Gallium | (+2). +3 | | 32 | Germanium | -4, +2, +4 | | 33 | Arsenic | -3, (+2), +3, +5 | | 34 | Selenium | -2, (+2), +4, +6 | | 35 | Bromine | -1, +1, (+3), (+4), +5 | | 36 | Krypton | 0 | | 37 | Rubidium | +1 | | 38 | Strontium | +2 | | 39 | Yttrium | +3 | | 40 | Zirconium | (+2), (+3), +4 | | 41 | Niobium | (+2), +3, (+4), +5 | | 42 | Molybdenum | (+2), +3, (+4), (+5), +6 | | 43 | Technetium | +6 | | 44 | Rubidium | (+2), +3, +4, (+6), (+7), +8 | | 45 | Rhodium | (+2), (+3), +4, (+6) | | 46 | Palladium | +2, +4, (+6) | | 47 | Silver | +1, (+2), (+3) | | 48 | Cadmium | (+1), +2 | | 49 | Indium | (+1), (+2), +3 | | 50 | Tin | +2, +4 | | 51 | Antimony | -3, +3, (+4), +5 | | 52 | Tellurium | -2, (+2), +4, +6 | | 53 | Indium | -1, +1, (=3), (+4), +5, +7 | | 54 | Xenon | 0 | | 55 | Cesium | +1 | | 56 | Barium | +2 | | 57 | Lanthanum | +3 | | 58 | Cerium | +3, +4 | | 59 | Praseodymium | +3 | | 60 | Neodymium | +3, +4 | | 61 | Promethium | +3 | | 62 | Samarium | (+2), +3 | | 63 | Europium | (+2), +3 | | 64 | Gadolinium | +3 | | 65 | Terbium | +3, +4 | | 66 | Dysprosium | +3 | | 67 | Holmium | +3 | | 68 | Erbium | +3 | | 69 | Thulium | (+2), +3 | | 70 | Ytterbium | (+2), +3 | | 71 | Lutetium | +3 | | 72 | Hafnium | +4 | | 73 | Tantalum | (+3), (+4), +5 | | 74 | Tungsten | (+2), (+3), (+4), (+5), +6 | | 75 | Rhenium | (-1), (+1), +2, (+3), +4, (+5), +6, +7 | | 76 | Osmium | (+2), +3, +4, +6, +8 | | 77 | Iridium | (+1), (+2), +3, +4, +6 | | 78 | Platinum | (+1), +2, (+3), +4, +6 | | 79 | Gold | +1, (+2), +3 | | 80 | Mercury | +1, +2 | | 81 | Thallium | +1, (+2), +3 | | 82 | Lead | +2, +4 | | 83 | Bismuth | (-3), (+2), +3, (+4), (+5) | | 84 | Polonium | (-2), +2, +4, (+6) | | 85 | Astatine | ? | | 86 | Radon | 0 | | 87 | Francium | ? | | 88 | Radium | +2 | | 89 | Actinium | +3 | | 90 | Thorium | +4 | | 91 | Protactinium | +5 | | 92 | Uranium | (+2), +3, +4, (+5), +6 |
Reference: Lange's Handbook of Chemistry, 8th Ed., Norbert A. Lange (Ed.), Handbook Publishers, Inc. 1952. |
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