Which of the following $N^{3 -}, O^{2 -}, F^{-}$ is largest in size?

N^{3 -}

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O^{2 -}

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F^{-}

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All of these

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Solution

The correct option is A $N^{3 -}$
As we go across the period, the size of atom decreases. So, size of $N$ is more compared to Oxygen and Fluorine.
Also, the size of anion is always more than that of atom. SO, $N^{3 -}$ has the largest size.

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