Which of the following pairs contains isoelectronic species?

B e

and

L i^{+}

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P^{+}

and

S^{-}

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N^{2 -}

and

N e

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O^{2 -}

and

N a^{+}

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Solution

The correct option is D $O^{2 -}$ and $N a^{+}$
Isoelectronic species are those ions or atoms which has same number of electrons as $O^{2^{-}}$ and $N a^{+}$ both contain 10 electrons therefore isoelectronic species.
Option D

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