Consider the isoelectronic species, `Na^(+),Mg^(2+),F^(-)` and `O^(2-)`. The correct order of increasing length of their radii is:

Options

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

Answer

B

Explanation

For isoelectronic species, radii `prop (1)/(Z)`