List of top Physics Questions on Atomic Physics asked in UP Board XII

Draw an energy level diagram for hydrogen atom. Calculate the wavelengths of (i) H$_\alpha$, (ii) H$_\beta$, and (iii) Series limit of Balmer series.
The difference in angular momentum of electrons between two successive orbits of hydrogen atom is:
Prove that the period of revolution (T) of electrons in stable orbits of the atom is directly proportional to the cube of the principal quantum number ($n$), on the basis of Bohr’s atom model.