A) \[C{{l}^{-}}\]
B) \[{{S}^{2-}}\]
C) \[N{{a}^{+}}\]
D) \[{{F}^{-}}\]
Correct Answer: B
Solution :
\[{{S}^{2-}}\] and \[C{{l}^{-}}\]both are isoelectronic but nuclear charge of \[C{{l}^{-}}\] is more than \[{{S}^{2-}}\]. So it has largest size.
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