Which of the following is the smallest in size?

Options

A. `N^(2-)`
B. `O^(2-)`
C. `F^(-)`
D. `Na^(+)`

Answer

D

Explanation

In `Na^(o+)` , 11 proton are attracting 10 electrons.
Increasing order of size `to Na^(+) lt F^(-) lt O^(2-) lt N^(3-)`