Question

Which of the following is largest

• A. $Cl^{-}$
• B. $S^{2 -}$
• C. $Na^{+}$
• D. $F^{-}$

Answer 1

Answer: (B)

$S^{2 -}$

Answer 2

$S^{2 -}$ and $Cl^{-}$both are isoelectronic but nuclear charge of $Cl^{-}$ is more than $S^{2 -}$. So it has largest size.