jan 1, 1913 - Niels Henrik David Bohr's discovery
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Niels Henrik David Bohr used Rutherford's experiment and the theory of the plum pudding to understand that the current model of the atom wasn't correct. His study was that Electrons move around a nucleus, but only in prescribed atom shells. He analyzed the Rutherford experment and calculating how far and at what angle the particles were projected, he could predict where the electrons can be in the atom. However this study was rejected because it only worked with the element hydrogen as it had 1 atom.
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