The energy of an electron in the first level of H atom is `- 13.6 eV` .The possible value s of the excited state s for electron in `He^(o+)` is (are)

Options

A. `-54.4 eV`
B. `-13.6 eV`
C. `-3.4 eV`
D. `-6.4 eV`

Answer

B, D

Explanation

The posible energy values of the excited state for an electron must be integer multiple to the ground state energy in other words energy abserbed or emitted most be intetegral (Plank's theory )