Question

Which of the following species has the ground state electron configuration of

$1s^{2}2s^{2}2p^{6}3s^{2}3p^6$?

• A. Sulfide ion, $S^{2-}$
• B. $HS{O}_4^{-}$
• C. $KOH$
• D. $HN{O}_3$
• E. $C_2{O}_4^{2-}$

Answer 1

Answer: (A)

Sulfide ion, $S^{2-}$

The sulphur atom has ground state electronic configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^4$.
The sulphide ion $S^{2-}$ has ground state electronic configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^6$.