Question
If $Br^-$ configuration is $[Ar]\, 3d^{10}\,4s^2\,4p^6$ then $Br^{+2}$ configuration will be identical to which element ?
✓
Answer
b
$Br ^{-}$ is : $[ Ar ] \,3 d ^{10} \,4 s ^2 \,4 p ^6$
$Br ^{-}$ is : $[ Ar ] \,3 d ^{10} \,4 s ^2 \,4 p ^6$
$Br ^{+2}$ is : $[ Ar ]\, 3 d ^{10} \,4 s ^2\, 4 p ^3$
The electronic configuration of $Br ^{+2}$ is hence identical with the element Arsenic.
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