which of the following has largest radius ?

Options

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

Answer

C

Explanation

The cation with greater positive charge will have smaller radius while the abion with greater negative charge will have larger radius: `O^(2-)gt F^(-) gt Na^(+) gt Mg^(2+)`