Pair containing isoelectronic species is?

H,He

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N a^{+}, N a

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N e, F^{-}

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F, C l

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Solution

The correct option is C $N e, F^{-}$
Iso electronic species are those having the same number of electrons.
Ne and $F^{-}$ both have 10 electrons and are therefore, iso electronic.

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