The energy of hydrogen atom in its ground state is `-13.6 eV`. The energy of the level corresponding to the quantum number `n = 5` is

Options

A. `- 0.54 eV`
B. `-5.40 eV`
C. `-0.85 eV`
D. `-2.72 eV`

Answer

A

Explanation

(a) `E_n = E_1 (Z^2)/(n^2)`
`E_5 = -13.6 xx ((1)^2)/((5)^2) = - 0.54 eV`.