Question

The electronic configuration of $C{r}^{3+}$ is

• A. $[Ar]3d^{4}4s^2$
• B. $[Ar]3d^{3}4s^0$
• C. $[Ar]3d^{2}4s^1$
• D. $[Ar]3d^{5}4s^1$

Answer 1

Answer: (B)

$Cr(24):[Ar]3d^{5}4s^1$
$C{r}^{3+}:[Ar]3d^{3}4s^0$