Question

if the radius of H is `0.53 Å` then what will be the radius of `._(3)Li^(2+)` ?
A. `0.17 Å`
B. `0.36 Å`
C. `0.53 Å`
D. `0.59 Å`

Answer 1

Correct Answer - A
The radius of hydrogen atom `=0.53 Å ._(3)Li^(2+)` ion also has only one electron feels three times more attraction from nucleus in comparison to hydrogen atom. Thus, the radius of `._(3)Li^(2+)` will be
`=(0.53)/3=0.17 Å`