There seems to be a need for a theory that explains both the particle and wave properties of the electron. Neils Bohr treated the proton and electron as point-charges and successfully calculated the energy levels. He attempted to explain the stability of the h-atom by suggesting the planetary model and circular orbits that do not radiate energy. However, he did not account for the wave properties of the electron. On the other hand, quantum mechanics uses the wave properties to explain hydrogen's spectral lines, yet fails to address the stability of the h-atom or its particle properties. Just my observation. Could some comment on a unified theory incorporating both properties.