When a hydrogen atom is excited from ground state to first excited state then

Options

A. Its kintic energy increases by `10.2 eV`
B. Its kinetic energy decreases by `10.2 eV`
C. It potential energy increases by `20.4 eV`.
D. Its angular momentum increases by `1.05 xx 10^(34) J-s`

Answer

B, C, D

Explanation

`|DeltaK| = 13.6[(1)/(1^(2)) - (1)/(2^(2))] = 10.2 eV` ltbr gt `|DeltaU| = 27.2 [(1)/(1^(2)) - (1)/(2^(2))] = 20.4eV`
`DeltaL = (2h)/(2pi) - (h)/(2pi) = (h)/(2pi)`