The angular momentum of an electron in hydrogen atom is `4 h// 2 pi`. Kinetic energy this electron is

Options

A. `4.35 eV`
B. `1.51 eV`
C. `0.85 eV`
D. `13.6 eV`

Answer

C

Explanation

As angular momentum of electron is `4 h// 2 pi`, it means electron is in the `4^(th)` orbit.
TE of atom in `4^(th)` orbit` - 0.85 eV`
KE of electron `= |TE| = 0.85 eV`