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. 1.06 Å
B. 0.265 Å
C. 0.17 Å
D. 0.53 Å

Answer

C

Explanation

`r_(n)=r_(a) xx (n^(2))/(Z)`
`r_(Li^(2+))=(r_(H))/(3)=(0.53)/(3)=0.17`Å