jan 1, 1913 - Bohr

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Bohr discovered that electrons have different energy levels in 1913. He saw that the electrons did not have to lose energy meaning they were able to somehow directly stay in orbit around the nucleus. His theory to this occurring says that they must have different sized rings(orbitals) surrounding the atom which will raise its total energy level. To increase energy levels bohr stated that a photon would have to hit the electron dead on which will cause it to go into excitation. when the energy is slowed down it will return to its original energy position. The only problem with is atomic model is that he follows the law of classical physics even though in more recent reached we know that atoms are in fact to small of a unit to be affected. This model uses rutherfords models, hoever, the only change present is the elctrons behavior.

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