Bohr suggested the revolutionary idea that electrons "jump" between energy levels ... in his model lined up with the regular patterns (spectral series) of light emitted by real hydrogen atoms.

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.

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 ...

Bohr suggested the revolutionary idea that electrons "jump" between energy levels ... in his model lined up with the regular patterns (spectral series) of light emitted by real hydrogen atoms.