Which one of the following ions has the smallest radius ?

C l^{-}

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S^{2 -}

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K^{+}

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C a^{2 +}

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Solution

The correct option is C $C a^{2 +}$
In isoelectronic species ion with highest positive charge will be smallest in size and ion with highest negative charge will be the highest in size.

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Similar questions

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

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

The correct order of ionic size of the species $K^{+}, C l^{-}, C a^{2 +}$ and $S^{2 -}$ is:

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

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

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