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  4. How many unpaired electrons are present in Fe2 + ion?

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Q. How many unpaired electrons are present in $Fe^{2 +}$ ion?

NTA AbhyasNTA Abhyas 2022

Solution:

Iron has atomic number $=26$ .
Configuration of $Fe=\left[\right.Ar\left]\right.3d^{6}4s^{2}$
After the removal of two electrons, the configuration becomes, $\left[\right.Ar\left]\right.3d^{6}4s^{0}$
Solution There are four unpaired electrons.