Taking the Bohr radius `a_(0) = 53` pm, the radius of `Li^(++)` ion in its ground state, on the basis of Bohr's model, will be about.

Options

A. 53pm
B. 27 pm
C. 18 pm
D. 13 pm

Answer

C

Explanation

The atomic number of lithium is 3, therfore the radius of `Li^(++)` in its ground state, on the basic of Bohr's model, will be about `(1)/(3)` tiems to that of Bohr radius.
Threrefore, the radius of lithium ion is near `(53)/(3) ~~18` pm