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

Radius of `n^(th)` orbit is given by `r_(n)=(r_(0)xxn^(2))/Z`
For `._(3)Li^(2+),r=r_(0)/3=0.53/3=0.176Å`