Question

Phosphide ion has the electronic structure similar to that of

• A. Nitride ion
• B. Fluoride ion
• C. Sodium ion
• D. Chloride ion

Answer 1

Answer: (D)

$P^{3-}=1s^{2}2s^{2}2p^{6}3s^{2}3p^6$
$C{l}^{-}=1s^{2}2s^{2}2p^{6}3s^{2}3p^6$
Both $P^{3-}$ and $C{l}^{-}$ have 18 electrons each.