Which one of following species are isoelectronic? $S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}$

S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}

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N a^{+}, C a^{2 +}, C l^{-}

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S^{2 -}, N a^{+}, C l^{-}

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S^{2 -}, C a^{2 +}, C l^{-}

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Solution

The correct option is D $S^{2 -}, C a^{2 +}, C l^{-}$
Among the given species, $S^{2 -}, C a^{2 +}, C l^{-}$ all are isoelectronic with 18 electrons while $N a^{+}$ has only 10 $e^{-} .$

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Similar questions

S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}

S^{2 -}, N a^{+}, C a^{2 +}, C l^{-}

Which of the following are isoelectronic species i.e., those having the same number of electrons?

Na⁺, K⁺, Mg²⁺, Ca²⁺, S^2–, Ar

K^{+}, S^{2 -}, C l^{-}

C a^{2 +}

Statement - I: $C l^{-} a n d C a^{2 +}$ are isoelectronic species.
Statement - II: Isoelectronic species should have same charges.

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