Iron (Fe) can have multiple oxidation states, with +2 (Fe²⁺) and +3 (Fe³⁺) being two common ones. Let's compare the ionic radii and electron configurations of these two ions.
### Electron Configurations
1. **Neutral Iron (Fe)**
- Atomic number: 26
- Electron Configuration: \([Ar] 4s^2 3d^6\)
2. **Fe²⁺ (Iron II)**
- To form \(\text{Fe}^{2+}\), two electrons are removed from the 4s and 3d orbitals.
- Electron Configuration:


