Question

On the basis of Bohr's model, the approximate radius of Li⁺⁺ ion in its ground state ifthe Bohr radius is a₀ = 53 pm : 

Options

• 13 pm

• 53 pm

• 27 pm

• 18 pm

Answer 1

18 pm

Explanation -

The radius of an atom in its ground state, according to Bohr's atom model.

${\displaystyle \text{r}=\frac{{\text{a}}_0}{\text{Z}}}$ where a₀ = Bohr's radius = 53 pm and Z = atomic number = 3 (for L_i⁺⁺) 

∴ r = 53/3 = 17.67 pm = 18 pm