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Question

(A) The ions $N^{3-}$,$O^{2-}$,and $F^{-}$ are isoelectronic species,meaning they all contain $10$ electrons.For isoelectronic species,the ionic radiu

Vedclass · Accepted Answer

$N^{3-} > O^{2-} > F^{-}$

Vedclass · Answer

(A) The ions $N^{3-}$,$O^{2-}$,and $F^{-}$ are isoelectronic species,meaning they all contain $10$ electrons.For isoelectronic species,the ionic radius decreases as the nuclear charge (atomic number) increases.The atomic numbers are: $N = 7$,$O = 8$,and $F = 9$.Since the nuclear charge increases in the order $N  O^{2-} > F^{-}$.Therefore,the correct order is $N^{3-} > O^{2-} > F^{-}$.

The order of the magnitude of ionic radii of ions $N^{3-}$,$O^{2-}$,and $F^{-}$ is:

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