Bohr Model Assumptions

Electrons bound in an atom can only occupy orbits for which the angular
momentum is quantized. This results in discrete values for the radius
and energy.

An electron in such a stationary state emits no radiation.

If an electron jumps to a lower state, it emits a photon whose energy
equals the difference in energy between the two states.

The angular momentum L of atomic electrons is quantized by the rule L =
n h/2p.