Manganese (Mn), atomic no 25 subshell electronic configuration:
1S2 2S2 2P6 3S2 3P6 3d5 4S2
The oxidation state of Mn in MnCl2, MnO2, Mn2O3, Mn2O3 are given below:
| Compound | Oxidation State of Mn | Subshell electronic configuration |
|---|---|---|
| MnCl2 | +2 | 1S2 2S2 2P6 3S2 3P6 3d5 |
| MnO2 | +4 | 1S2 2S2 2P6 3S2 3P6 3d3 |
| Mn2O3 | +3 | 1S2 2S2 2P6 3S2 3P6 3d4 |
| Mn2O7 | +7 | 1S2 2S2 2P6 3S2 3P6 |