Question

What is the ground state electron configuration of the $M{n}^{2+}$ ion?

• A. $\left[Ar\right]4s^{1}3d^5$
• B. $\left[Ar\right]4s^{2}3d^3$
• C. $\left[Ar\right]3d^5$
• D. $\left[Ar\right]3d^4$

Answer 1

The correct option is C $\left[Ar\right]3d^5$

The ground state electron configuration of the $Mn$ atom is $\left[Ar\right]3d^{5}4s^2$.

The ground state electron configuration of the $M{n}^{2+}$ ion is $\left[Ar\right]3d^5$.

Hence, option C is correct.