Q. Excited state configuration of ${Mn}^{2 +}$ is
A) $t_{2g}^{4}$
B) $t_{2g}^{3}e_{g}^{2}$
C) $t_{2g}^{4}e_{g}^{2}$
D) $t_{2g}^{5}e_{g}^{0}$
Explanation
(b)
Configuration of $Mn^{2 +}$ is
[Ar]$3d^{5}$
According to CFSE (crystal field stabilisation energy), in excited state of $Mn^{2 +}$ ion, three electrons go in $t_{2g}$ level $\left( d_{xy},d_{yz}\ and\ d_{zx} \right)$ and two electrons go in $e_{g}$ level ($d_{z^{2}}$ and $D_{x^{2} - y^{2}}$).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.