The most probable radius (in pm) for finding the electron in `He^(+)` is.

Options

A. 0
B. `52.9`
C. `26.5`
D. `105.8`

Answer

C

Explanation

Radius of first orbit in `He^(+)`,
`r = (n^(2))/(Z) xx 0.529 xx 10^(-10)` ltbr. `n = (1^(2) xx 0.529 xx 10^(-10)m)/(2)`
`= 0.2645 xx 10^(-10)m = 2.645 xx 10^(-11) m`
`= 2.645 xx 10^(-11) xx 10^(12) "pm" = 26.45 "pm"`