Question

Which of the following isoelectronic species has the smallest atomic radius

• A. $N^{3-}$
• B. $O^{2-}$
• C. $F^{-}$
• D. Ne

Answer 1

Answer: (C)

The ionic size of isoelectronic species decreases with increase in effective nuclear charge. Ionic size $\alpha =\frac{1}{Effectivenuclearcharge}$