Compounds
| Oxidation states |
|
|---|---|
| −2 | Na2 |
| −1 | Na2 |
| 0 | Cr(C6H6)2 |
| +1 | K3 |
| +2 | CrCl2 |
| +3 | CrCl3 |
| +4 | K2CrF6 |
| +5 | K3CrO8 |
| +6 | K2CrO4 |
Chromium is a member of the transition metals, in group 6. Chromium(0) has an electronic configuration of 4s13d5, owing to the lower energy of the high spin configuration. Chromium exhibits a wide range of possible oxidation states, where the +3 state is most stable energetically; the +3 and +6 states are most commonly observed in chromium compounds, whereas the +1, +4 and +5 states are rare.
The following is the Pourbaix diagram for chromium in pure water, perchloric acid or sodium hydroxide:
Read more about this topic: Chromium Compounds
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