Which of the following is correct for the same radius of ion ieach pair ?

Options

A. `r_4 He^+ and r_1H`
B. `r_2Be^(3+)` and `r_1H`
C. `r_2 He^+ and r_1H`
D. `r_3 Li^(2+) and r_1H`

Answer

B

Explanation

`r-2 Be^(2+) = (r_2H)/4 = (r_1 Hxx 2^2)/4 r_1H`.