The valence shell electronic configuration of (Cr^{2 +}) ion... | CHEMISTRY - ELECTRONIC CONFIGURATIONS OF THE D-BLOCK ELEMENTS | SolveeIt | Solveeit

Today, August 18

Question

The valence shell electronic configuration of $Cr^{2 +}$ ion is.

A

$4s^{o}3d^{4}$

B

$4s^{2}3d^{2}$

C

$4s^{2}3d^{0}$

D

$3p^{6}4s^{2}$

Answer

$4s^{o}3d^{4}$

Explanation

Solution

Electronic configuration of chromium

$Cr \rightarrow \lbrack Ar\rbrack 3d^{5}4s^{1}$

$Cr^{2 +} \rightarrow \lbrack Ar\rbrack 3d^{4}4s^{0}$ .