Ionic radii (in Å) of `As^(3+), Sb^(3+)` and `Bi^(3+)` follow the order :

Options

A. `As^(3+)gtSb^(3+)gtBi^(3+)`
B. `Sb^(3+)gtBi^(3+)gtAs^(3+)`
C. `Bi^(3+)gtAs^(3+)gtSb^(3+)`
D. `Bi^(3+)gtSb^(3+)gtAs^(3+)`

Answer

D

Explanation

As we go down in the group the ionic radii increase due to increase in the atomic radii.