Among the following groups which represents the collection of isoelectronic species?

N O^{+}, C_{2}^{2 -}, O_{2}^{-}, C O

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N_{2}, C_{2}^{2 -}, C O_{2}^{-}, N O

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C O, N O^{+}, C N^{-}, C_{2}^{2 -}

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N O, C N^{-}, N_{2}, O_{2}^{-}

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Solution

The correct option is C $C O, N O^{+}, C N^{-}, C_{2}^{2 -}$
$C O, N O^{+}, C N^{-}, C_{2}^{2 -}$ has 14 electrons each. Carbon has 6 electrons. Oxygen has 8 electrons. Nitrogen has 7 electrons.

If the molecule has a negative charge, add the number of electrons equal to negative charge. If the molecules have a positive charge then subtract the number of electrons equal to that of positive charge.

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