Among the ions Mg^{2+}, O^{2-}, Al^{3+}, F^{- | vedclass

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(D) All the given ions $(Mg^{2+}, O^{2-}, Al^{3+}, F^{-}, Na^{+}, N^{3-})$ are isoelectronic species,as they all contain $10$ electrons.For isoelectro

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$N^{3-}, Al^{3+}$

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(D) All the given ions $(Mg^{2+}, O^{2-}, Al^{3+}, F^{-}, Na^{+}, N^{3-})$ are isoelectronic species,as they all contain $10$ electrons.For isoelectronic species,the ionic size decreases as the nuclear charge (atomic number) increases.The atomic numbers are: $N=7, O=8, F=9, Na=11, Mg=12, Al=13$.Since $Al^{3+}$ has the highest atomic number $(Z=13)$,it has the smallest size.Since $N^{3-}$ has the lowest atomic number $(Z=7)$,it has the largest size.Therefore,the ion with the largest size is $N^{3-}$ and the ion with the smallest size is $Al^{3+}$.

Among the ions $Mg^{2+}, O^{2-}, Al^{3+}, F^{-}, Na^{+}$ and $N^{3-}$,the ion with largest size and ion with smallest size are respectively

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