jan 1, 1924 - Louis De Broglie

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-August 15, 1892, Dieppe, France - March 19, 1987, Louveciennes
-In 1924 predicted the wave nature of the electrons and suggested that all matter have wave properties
-experimental evidence had shown that electrons must move around the nucleus of an atom and that certain restrictions are placed on this motion, In a closed loop (like that traditionally associated with an electron moving around a nucleus), the undulations of a wave must stretch evenly around the entirety of the loop and consist of a whole number of wavelengths. If they do not, then the wave is cancelled. These conditions on a closed-loop wave are consistent with the evidence that an electron in an atom has only available to it a select set of configurations.

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