The ions `O^(2-), F^-, Na^+, Mg^(2+)` and `Al^(3+)` iso-electronic. Their ionic radii show are

Options

A. a significant increases from `O^(2-)` to `Al^(3+)`
B. a significant decreases from `O^(2-)` to `Al^(3+)`
C. an increases from `O^(2-)` to `F^(-)` and then decreases from `Na^(+)` to `Al^(3+)`
D. a decreases from `O^(2-)` to `F^(-)` and then increases from `Na^(+)` to `Al^(3+)`

Answer

B

Explanation

Among the isoelectronic ions, the ionic radius decreases with increases in nuclear charge.