Bohr's model of the atom There were some problems with Rutherford's model: for example, it could not explain the very interesting observation that atoms only emit light at certain wavelengths or frequencies. Niels Bohr solved this problem by proposing that the electrons could only orbit the nucleus in certain special orbits at different energy levels around the nucleus (jan 20, 1911 – jan 20, 1913)
Added to timeline:
Date:
jan 20, 1911
jan 20, 1913
~ 2 years