The correct decreasing order of ionic radii for the isoelectronic species $N^{3-}, O^{2-}, F^-$ is:
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Question

The correct decreasing order of ionic radii for the isoelectronic species $N^{3-}, O^{2-}, F^-$ is:

Accepted Answer

Among isoelectronic species, as nuclear charge ($Z$) increases, ionic radius decreases. $N^{3-} (Z=7) > O^{2-} (Z=8) > F^- (Z=9)$.

Classification of Elements and Periodicity in Properties