Original sentence: Electrons also break free of atoms when sufficeintly excited.In 1911, Niels Bohr realized that since the motion (momentum) of an orbiting electron is like that of a wave, then one complete cycle (the distance of one orbital circumfrence) must be a distinct number of wavelengths.Through this he argued convincingly that the electron orbits in discrete energy states, otherwise the electromagnetic spectrum, including visible light, would be continuous
Edited sentence: Although this was not a correct theory, he correctly deduced that since the motion (momentum) of an orbiting electron is like that of a wave, then one complete cycle (the distance of one orbital circumfrence) must be a discrete number of wavelengths.Electron (wave packets) also break free of atoms when sufficeintly excited.From  this he  stated that the electron's orbits occur in quantisized energy states, otherwise the electromagnetic spectrum, including visible light, would be continuous.In 1913, Niels Bohr described the structure of an atom as analagolous to a miniature solar system.See main article: Atomic orbital.The photons are emitted or absorbed in units of definite discrete energies