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

Options

A. `0.0`
B. `52.9`
C. `26.5`
D. `105.8`

Answer

C

Explanation

The most probable radius is the radius of the first orbit in `He^(+)`. It can be calculated by using Bohr's theory:
`r_(n) = (n^(2)r_(1))/(Z) = ((1)^(2)(52.9 p m))/(2) = 26.45p m`