Question

Configuration of $B{r}^{-}$ is : $\left[Ar\right]3d^{10}4s^{2}4p^6$ The electronic configuration of $B{r}^{+2}$ would be identical with the element:

• A. $Se$
• B. $As$
• C. $Ga$
• D. $Ge$

Answer 1

Answer: (B)

$As$

$B{r}^{-}$ is : $\left[Ar\right]3d^{10}4s^{2}4p^6$
$B{r}^{+2}$ is : $\left[Ar\right]3d^{10}4s^{2}4p^3$
The electronic configuration of $B{r}^{+2}$ is hence identical with the element Arsenic.