Thus de Broglie hypothesis provided an
explanation for Bohr’s second postulate for the quantisation of angular
momentum of the orbiting electron The quantised electron orbits and
energy states are due to the wave nature of the electron and only resonant
standing waves can persist Bohr’s model, involving classical trajectory picture (planet-like electron
orbiting the nucleus), correctly predicts the gross features of the
hydrogenic atoms*, in particular, the frequencies of the radiation emitted
or selectively absorbed This model however has many limitations