Question

Taking the Bohr radius as a₀= 53 pm, the radius of Li⁺⁺ ion in its ground state, on the basis of Bohr's model, will be about ______.

Options

• 53 pm

• 27 pm

• 18 pm

• 13 pm

Answer 1

Taking the Bohr radius as a₀= 53 pm, the radius of Li⁺⁺ ion in its ground state, on the basis of Bohr's model, will be about 18 pm.

Explanation:

`"r"  alpha  1/"z"`

For Li⁺⁺, Z = 3

∴ `"r"_"Li"/"r"_0 = "Z"/"Z"_"Li"= 1/3`

∴ `"r"_"Li" =""_0/3 = 53/3 \approx 18  "pm"`