Which of the following sets represents the collection of isoelectronic species?

N a^{+}, M g^{2 +}, A l^{3 +}, C l^{-}

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N a^{+}, C a^{2 +}, S c^{3 +}, F^{-}

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K^{+}, C l^{-}, C a^{2 +}, S c^{3 +}

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K^{+}, C a^{2 +}, S c^{3 +}, F^{-}

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Solution

The correct option is C $K^{+}, C l^{-}, C a^{2 +}, S c^{3 +}$
Consider the number of electrons in each ion:-
A) $N a^{+} - 10, M g^{2 +} - 10, A l^{3 +} - 10, C l^{-} - 18$
B) $N a^{+} - 10, C a^{2 +} - 18, S c^{3 +} - 18, F^{-} - 10$
C) $K^{+} - 18, C l^{-} - 18, C a^{2 +} - 18, S c^{3 +} - 18$
D) $K^{+} - 18, C a^{2 +} - 18, S c^{3 +} - 18, F^{-} - 10$

So, option C is the correct answer.

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Similar questions

Which of the following sets contain only isoelectronic ions?
(i) $Z n^{2 +}, C a^{2 +}, G a^{3 +}, A l^{3 +}$

(ii) $K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

(iii) $P^{3 -}, S^{2 -}, C l^{-}, K^{+}$

(iv) $T i^{4 +}, A r, C r^{3 +}, v^{5 +}$

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

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

\begin{matrix} C l^{-}, A r, K^{+}, O^{2 -}, M g^{2 +}, F^{-} \end{matrix}

C a^{2 +}

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