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 (20 Jan 1911 Jahr – 20 Jan 1913 Jahr)
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20 Jan 1911 Jahr
20 Jan 1913 Jahr
~ 2 years