In the ground-state electron configuration of Fe3+, how many unpaired electrons are present?

In the ground-state electron configuration of Fe3+, five  unpaired electrons are present.



Explanation:

To find out the number of unpaired electrons in Fe^3+ ion, you need to write the electron configuration of Fe3+.Remember that the atomic number of iron is 26.


Here is the ground state electron configuration of Fe^3+:

[Ar]3d⁵

Remember that the d subshell has five orbitals.Each orbit can take maximum two electrons.
In the ground-state electron configuration of Fe3+, how many unpaired electrons are present?


In case of filling degenerate orbits ,each orbital will take one electron before pairing by the second electron according to Hunds' rule.


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