Question

Electronic configuration (outermost) of $Mn^{2+}$ ion(At. No. of Mn = 25) in its ground state is

• A. $3d^5 4s^0$
• B. $3d^4s^1$
• C. $3d^3 4s^2$
• D. $3d^2 4s^2p^2$

Answer 1

Answer: (A)

$3d^5 4s^0$

Answer 2

Mn(Z = 25) : $[Ar]^{18} 4s^2 3d^5$ $Mn^{2+} : [Ar]^{18} \, 3d^5\, 4s^0$