Question

The electronic configuration of chlorine atom is :

• A. $1s^{2}2s^2{p}^{6}3s^3{p}^5$
• B. $1s^{2}2s^3{p}^{6}3s^3{p}^4$
• C. $1s^{2}2s^2{p}^{6}3s^2{p}^5$
• D. $1s^{2}2s^2{p}^{6}3s^2{p}^6$

Answer 1

The correct option is C $1s^{2}2s^2{p}^{6}3s^2{p}^5$

$Cl:1s^{2}2s^2{p}^{6}3s^2{p}^5$
$C{l}^{-}:1s^{2}2s^2{p}^{6}3s^2{p}^6$