Which one of the following species possesses | vedclass

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(D) All the given species ($Na^{+}$,$F^{-}$,$Ne$,$O^{2-}$) are isoelectronic,meaning they all contain $10$ electrons.For isoelectronic species,the ion

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$O^{2-}$

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(D) All the given species ($Na^{+}$,$F^{-}$,$Ne$,$O^{2-}$) are isoelectronic,meaning they all contain $10$ electrons.For isoelectronic species,the ionic radius increases as the nuclear charge (number of protons) decreases.The number of protons in these species are: $Na^{+} = 11$,$Ne = 10$,$F^{-} = 9$,and $O^{2-} = 8$.Since $O^{2-}$ has the lowest nuclear charge $(8)$,it has the weakest attraction for the electrons,resulting in the maximum size.

Which one of the following species possesses maximum size?

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