The radius of the second Bohr for `Li^(2+)` is

Options

A. `0.529 xx (4)/(3) Å`
B. `0.529 xx (2)/(3) Å`
C. `0.529 xx (4)/(9) Å`
D. `0.529 xx (2)/(9) Å`

Answer

A

Explanation

`r_(n) = (r_(1) for H xx n^(2))/(Z) = (0.529 Å xx n^(2))/(Z)`
` r_(2) for Li^(2+) = (0.529 xx 2^(2))/(3)= (0.529 xx 4)/(3)Å`