In 1913, Niels Bohr revised Rutherford's model by suggesting that the electrons orbited the nucleus in different energy levels or at specific distances from the nucleus. By doing this, he was able ...

In 1912 Bohr joined Rutherford. He realized that Rutherford's model wasn't quite right ... idea that electrons "jump" between energy levels (orbits) in a quantum fashion, that is, without ever ...

Bohr proposed adding to the model the new idea of quanta put forth by Max Planck in 1901. That way, electrons existed at set levels of energy, that is, at fixed distances from the nucleus.