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October 1, 2025
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Timeline of Atomic Theory
Category:
Otro
Actualizado:
18 oct 2018
Timeline of Atomic Theory from group Billy Gillman, Kamile Yocum, and Quintin Allen.
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332
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Created by
Quintin
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Eventos
Sir William Crooke demonstrated that atoms had negative charges.
Períodos
Democritus devises first atomic theory.
John Dalton defined an atom as a small indivisible particle that cannot be created or destroyed.
J. J. Thomson discovered the ratio of charge to mass of electrons.
Röntgen discovered x-rays, and Becquerel discovered radioactivity.
Rutherford discovered the nucleus.
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