Answer:
1s2 2s2 2p6 3s2 3p6 3d6
Step-by-step explanation:
We are required to determine the electron configuration of Fe²⁺
We need to know that;
Atomic number of Iron (Fe) is 26
- Therefore, electron configuration of Iron (Fe) atom is [Ar] 3d64s2 or 1s2 2s2 2p6 3s2 3p6 4s2 3d6
- Fe²⁺ is a cation that is formed when a an atom of Fe loses two electrons
- Therefore;
Fe²⁺ will have 24 electrons
- Hence, the atomic configuration of Fe²⁺ is given by 1s2 2s2 2p6 3s2 3p6 3d6 since the two electrons are removed from the 4s2.
Thus, electron configuration of Fe²⁺ is 1s2 2s2 2p6 3s2 3p6 3d6