Question

Which of the following is the smallest in size?

• A. $O^{2-}$
• B. $C^{4-}$
• C. $F^{-}$
• D. $N^{3-}$

Answer 1

The correct option is C

$F^{-}$

As the nuclear charge per electron is maximum in $F^{-}$, it is the smallest in size.