Rank the isoelectronic species ,

CHEMISTRY · Subjective · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

Rank the isoelectronic species

\mathrm{O}^{2-}

\mathrm{F}^{-}

, and

\mathrm{Na}^{+}

in order of increasing ionic radius and justify your answer in one sentence.