Which of the following orders of ionic radii | vedclass

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(D) Cations lose electrons and are smaller in size than the parent atom,whereas anions gain electrons and are larger in size than the parent atom. For

Vedclass · Accepted Answer

None of the above

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(D) Cations lose electrons and are smaller in size than the parent atom,whereas anions gain electrons and are larger in size than the parent atom. For the hydrogen species,the order is $H^{-} > H > H^{+}$. For isoelectronic species,the ionic radius decreases as the atomic number (nuclear charge) increases. Comparing $O^{2-}$,$F^{-}$,and $Na^{+}$,all have $10$ electrons. Their atomic numbers are $8$,$9$,and $11$ respectively. Therefore,the correct order of ionic radii is $O^{2-} > F^{-} > Na^{+}$. Since none of the provided options $A$,$B$,or $C$ correctly represent this order,the correct answer is $D$.

Which of the following orders of ionic radii is correctly represented?

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