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first proposed the existance of an ultimate particle
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Proposed the perodic law asnd developed the first periodic table
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Determined teh unit of charge of the electron
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Appled quantum theory by assuming that electrons travel in stationary orbits
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He is best known for his uncertainty principle, which restricts the accuracy with which some properties of atoms and particles--such as position and linear momentum--can be determined simultaneously
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The introduction of wave mechanics stands