Q. The energy of a hydrogen atom in its ground state is $- 13.6eV$. The energy of the level corresponding to the quantum number $n = 5$ is
A) $- 0.54\ eV$
B) $- 5.40\ eV$
C) 20.58 eV
D) $- 2.72\ eV$
Explanation
(a) $E_{5} = - \frac{13.6}{5^{2}}eV = - 0.54\ eV$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.