What is the electron configuration of an Fe2 + ion?

1s2 2s2 2p6 3s2 3p6 3d6

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