The radus of hydrogen atom in the ground state `0.53 Å`. The radius of `Li^(2+)` ion (Atomic number = 3) in a similar state is

Options

A. `0.176 Å`
B. `0.53 Å`
C. `0.30 Å`
D. `1.25 Å`

Answer

A

Explanation

Radius of `Li^(2+)` ion (Z = 3) in the ground state
`= (r_(H) xx n^(2))/(Z) = (0.53 xx 1^(2))/(3) = 0.176 Å`