| Metal | Oxidation States |
| Sc | 0, 3 |
| Ti | 0, 2, 3 [not found on earth], 4 [TiO+2] |
| V | 0, 2, 3, 4 [VO+2], 5 [V(OH) |
| Cr | 0, 2, 3, 6 [Cr2O |
| Mn | 0, 2, 3, 4 [MnO2], 6 [MnO |
| Fe | 0, 2, 3, 5 [FeO |
| Co | 0, 2, 3, 4 [CoO2] |
| Ni | 0, 2, 4 [NiO2], 6 [NiO |
| Cu | 0, 1, 2, 3 |
| Zn | 0, 2 |
| Sn | 0, 2, 4 |

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