Oxidation states
This is a list of all chemical elements in periodic table with their symbols and oxidation states. Click on the column header to sort the table by that column or click on an element name to get detailed facts about the element.
| No. | Symbol | Element | Oxidation states | Oxide type |
|---|---|---|---|---|
| 1 | H | Hydrogen | −1, +1 | an amphoteric oxide |
| 2 | He | Helium | 0 | - |
| 3 | Li | Lithium | +1 | a strongly basic oxide |
| 4 | Be | Beryllium | 0, +1, +2 | an amphoteric oxide |
| 5 | B | Boron | −5, −1, 0, +1, +2, +3 | a mildly acidic oxide |
| 6 | C | Carbon | −4, −3, −2, −1, 0, +1, +2, +3, +4 | a mildly acidic oxide |
| 7 | N | Nitrogen | −3, −2, −1, +1, +2, +3, +4, +5 | a strongly acidic oxide |
| 8 | O | Oxygen | −2, −1, 0, +1, +2 | - |
| 9 | F | Fluorine | −1, 0 | oxidizes oxygen |
| 10 | Ne | Neon | 0 | - |
| 11 | Na | Sodium | −1, +1 | a strongly basic oxide |
| 12 | Mg | Magnesium | +1, +2 | a strongly basic oxide |
| 13 | Al | Aluminium | −2, −1, +1, +2, +3 | an amphoteric oxide |
| 14 | Si | Silicon | −4, −3, −2, −1, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 15 | P | Phosphorus | −3, −2, −1, 0, +1, +2, +3, +4, +5 | a mildly acidic oxide |
| 16 | S | Sulfur | −2, −1, 0, +1, +2, +3, +4, +5, +6 | a strongly acidic oxide |
| 17 | Cl | Chlorine | −1, +1, +2, +3, +4, +5, +6, +7 | a strongly acidic oxide |
| 18 | Ar | Argon | 0 | - |
| 19 | K | Potassium | −1, +1 | a strongly basic oxide |
| 20 | Ca | Calcium | +1, +2 | a strongly basic oxide |
| 21 | Sc | Scandium | 0, +1, +2, +3 | an amphoteric oxide |
| 22 | Ti | Titanium | −2, −1, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 23 | V | Vanadium | −3, −1, 0, +1, +2, +3, +4, +5 | an amphoteric oxide |
| 24 | Cr | Chromium | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6 | depending on the oxidation state, an acidic, basic, or amphoteric oxide |
| 25 | Mn | Manganese | −3, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7 | depending on the oxidation state, an acidic, basic, or amphoteric oxide |
| 26 | Fe | Iron | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7 | an amphoteric oxide |
| 27 | Co | Cobalt | −3, −1, 0, +1, +2, +3, +4, +5 | an amphoteric oxide |
| 28 | Ni | Nickel | −2, −1, 0, +1, +2, +3, +4 | a mildly basic oxide |
| 29 | Cu | Copper | −2, 0, +1, +2, +3, +4 | a mildly basic oxide |
| 30 | Zn | Zinc | −2, 0, +1, +2 | an amphoteric oxide |
| 31 | Ga | Gallium | −5, −4, −3, −2, −1, +1, +2, +3 | an amphoteric oxide |
| 32 | Ge | Germanium | −4 −3, −2, −1, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 33 | As | Arsenic | −3, −2, −1, 0, +1, +2, +3, +4, +5 | a mildly acidic oxide |
| 34 | Se | Selenium | −2, −1, +1, +2, +3, +4, +5, +6 | a strongly acidic oxide |
| 35 | Br | Bromine | −1, +1, +3, +4, +5, +7 | a strongly acidic oxide |
| 36 | Kr | Krypton | 0, +1, +2 | rarely more than 0; oxide is unknown |
| 37 | Rb | Rubidium | −1, +1 | a strongly basic oxide |
| 38 | Sr | Strontium | +1, +2 | a strongly basic oxide |
| 39 | Y | Yttrium | 0, +1, +2, +3 | a weakly basic oxide |
| 40 | Zr | Zirconium | −2, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 41 | Nb | Niobium | −3, −1, 0, +1, +2, +3, +4, +5 | a mildly acidic oxide |
| 42 | Mo | Molybdenum | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6 | a strongly acidic oxide |
| 43 | Tc | Technetium | −3, −1, 0, +1, +2, +3, +4, +5, +6, +7 | a strongly acidic oxide |
| 44 | Ru | Ruthenium | −4, −2, 0, +1, +2, +3, +4, +5, +6, +7, +8 | a mildly acidic oxide |
| 45 | Rh | Rhodium | −3, −1, 0, +1, +2, +3, +4, +5, +6 | an amphoteric oxide |
| 46 | Pd | Palladium | 0, +1, +2, +3, +4 | a mildly basic oxide |
| 47 | Ag | Silver | −2, −1, +1, +2, +3 | an amphoteric oxide |
| 48 | Cd | Cadmium | −2, +1, +2 | a mildly basic oxide |
| 49 | In | Indium | −5, −2, −1, +1, +2, +3 | an amphoteric oxide |
| 50 | Sn | Tin | −4, −3, −2, −1, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 51 | Sb | Antimony | −3, −2, −1, 0, +1, +2, +3, +4, +5 | an amphoteric oxide |
| 52 | Te | Tellurium | −2, −1, +1, +2, +3, +4, +5, +6 | a mildly acidic oxide |
| 53 | I | Iodine | −1, +1, +3, +4, +5, +6, +7 | a strongly acidic oxide |
| 54 | Xe | Xenon | 0, +1, +2, +4, +6, +8 | rarely more than 0; a weakly acidic oxide |
| 55 | Cs | Cesium | −1, +1 | a strongly basic oxide |
| 56 | Ba | Barium | +1, +2 | a strongly basic oxide |
| 57 | La | Lanthanum | 0, +1, +2, +3 | a strongly basic oxide |
| 58 | Ce | Cerium | +1, +2, +3, +4 | a mildly basic oxide |
| 59 | Pr | Praseodymium | 0, +1, +2, +3, +4, +5 | a mildly basic oxide |
| 60 | Nd | Neodymium | 0, +2, +3, +4 | a mildly basic oxide |
| 61 | Pm | Promethium | +2, +3 | a mildly basic oxide |
| 62 | Sm | Samarium | 0, +2, +3 | a mildly basic oxide |
| 63 | Eu | Europium | 0, +2, +3 | a mildly basic oxide |
| 64 | Gd | Gadolinium | 0, +1, +2, +3 | a mildly basic oxide |
| 65 | Tb | Terbium | 0, +1, +2, +3, +4 | a weakly basic oxide |
| 66 | Dy | Dysprosium | 0, +1, +2, +3, +4 | a weakly basic oxide |
| 67 | Ho | Holmium | 0, +1, +2, +3 | a basic oxide |
| 68 | Er | Erbium | 0, +1, +2, +3 | a basic oxide |
| 69 | Tm | Thulium | 0, +2, +3 | a basic oxide |
| 70 | Yb | Ytterbium | 0, +1, +2, +3 | a basic oxide |
| 71 | Lu | Lutetium | 0, +1, +2, +3 | a weakly basic oxide |
| 72 | Hf | Hafnium | −2, 0, +1, +2, +3, +4 | an amphoteric oxide |
| 73 | Ta | Tantalum | −3, −1, 0, +1, +2, +3, +4, +5 | a mildly acidic oxide |
| 74 | W | Tungsten | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6 | a mildly acidic oxide |
| 75 | Re | Rhenium | −3, −1, 0, +1, +2, +3, +4, +5, +6, +7 | a mildly acidic oxide |
| 76 | Os | Osmium | −4, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8 | a mildly acidic oxide |
| 77 | Ir | Iridium | −3, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8, +9 | - |
| 78 | Pt | Platinum | −3, −2, −1, 0, +1, +2, +3, +4, +5, +6 | a mildly basic oxide |
| 79 | Au | Gold | −3, −2, −1, 0, +1, +2, +3, +5 | an amphoteric oxide |
| 80 | Hg | Mercury | −2 , +1, +2 | a mildly basic oxide |
| 81 | Tl | Thallium | −5, −2, −1, +1, +2, +3 | a mildly basic oxide |
| 82 | Pb | Lead | −4, −2, −1, +1, +2, +3, +4 | an amphoteric oxide |
| 83 | Bi | Bismuth | −3, −2, −1, +1, +2, +3, +4, +5 | a mildly acidic oxide |
| 84 | Po | Polonium | −2, +2, +4, +5, +6 | an amphoteric oxide |
| 85 | At | Astatine | −1, +1, +3, +5, +7 | - |
| 86 | Rn | Radon | 0, +2, +6 | - |
| 87 | Fr | Francium | +1 | a strongly basic oxide |
| 88 | Ra | Radium | +2 | expected to have a strongly basic oxide |
| 89 | Ac | Actinium | +3 | a strongly basic oxide |
| 90 | Th | Thorium | +1, +2, +3, +4 | a weakly basic oxide |
| 91 | Pa | Protactinium | +2, +3, +4, +5 | a weakly basic oxide |
| 92 | U | Uranium | +1, +2, +3, +4, +5, +6 | an amphoteric oxide |
| 93 | Np | Neptunium | +2, +3, +4, +5, +6, +7 | an amphoteric oxide |
| 94 | Pu | Plutonium | +2, +3, +4, +5, +6, +7, +8 | an amphoteric oxide |
| 95 | Am | Americium | +2, +3, +4, +5, +6, +7 | an amphoteric oxide |
| 96 | Cm | Curium | +3, +4, +5, +6 | an amphoteric oxide |
| 97 | Bk | Berkelium | +2, +3, +4, +5 | - |
| 98 | Cf | Californium | +2, +3, +4, +5 | - |
| 99 | Es | Einsteinium | +2, +3, +4 | - |
| 100 | Fm | Fermium | +2, +3 | - |
| 101 | Md | Mendelevium | +2, +3 | - |
| 102 | No | Nobelium | +2, +3 | - |
| 103 | Lr | Lawrencium | +3 | - |
| 104 | Rf | Rutherfordium | (+2), (+3), +4 | - |
| 105 | Db | Dubnium | (+3), (+4), +5 | parenthesized: prediction |
| 106 | Sg | Seaborgium | 0, (+3), (+4), (+5), +6 | parenthesized: prediction |
| 107 | Bh | Bohrium | (+3), (+4), (+5), +7 | parenthesized: prediction |
| 108 | Hs | Hassium | (+2), (+3), (+4), (+6), +8 | prediction |
| 109 | Mt | Meitnerium | (+1), (+3), (+4), (+6), (+8), (+9) | predicted |
| 110 | Ds | Darmstadtium | (0), (+2), (+4), (+6), (+8) | predicted |
| 111 | Rg | Roentgenium | (−1), (+1), (+3), (+5), (+7) | predicted |
| 112 | Cn | Copernicium | 0, (+1), +2, (+4) | parenthesized: prediction |
| 113 | Nh | Nihonium | (−1), (+1), (+3), (+5) | predicted |
| 114 | Fl | Flerovium | (0), (+1), (+2), (+4), (+6) | predicted |
| 115 | Mc | Moscovium | (+1), (+3) | predicted |
| 116 | Lv | Livermorium | (−2), (+2), (+4) | predicted |
| 117 | Ts | Tennessine | (−1), (+1), (+3), (+5) | predicted |
| 118 | Og | Oganesson | −1), (0), (+1), (+2), (+4), (+6) | predicted |