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The radii of $F$ , $F^{-}$ , of $O$ and $O^{2 -}$ are in the order of:

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O^{2 -} > F^{-} > F > O

F^{-} > O^{2 -} > F > O

O^{2 -} > O > F^{-} > F

O^{2 -} > F^{-} > O > F

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detailed solution

Correct option is D

The anion is bigger than its parent atom in size. Additionally, the size is less the higher the effective nuclear charge. Thus, the proper sequence is $O^{2 -} > F^{-} > O > F$ .

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The radii of F, F-, of O and O2- are in the order of: