The set representing the correct order of ionic radii is

1.	The set representing the correct order of ionic radii is
Answer» `Na^(+) gt Li^(+) gt Mg^(2+) gt Be^(2+)` `Li^(+) gt Na^(+) gt Mg^(2+) gt Be^(2+)` `Mg^(2+) gt Be^(2+) gt Li^(+)gt Na^(+)` `Li^(+) gt Be^(2+) gt Na^(+) gt Mg^(2+)` Solution :The ionic radii of alkali metalions are larger thanthose of the corresponding alkaline earth metal IONS . ALSO ionic radii increase down thegroup . Therefore , the ionic size radii DECREASE in the order : `Na^(+) gt Li^(+) gt Mg^(2+) gt Be^(2+) ` i.e., option (a) is CORRECT .

Discussion