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ATOMIC THEORY TIMELINE
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26 Oct 2017
John Dalton proposed his theory on atoms.
Dmitri Mendeleeve created the periodic table
G.J. Stoney theorised that electricity was composed of negative particals that he called electrons
E. Goldstein discovered canal rays that had a positive charge equal to an electron's
JJ Thompson discovered the electron
JJ Thompson determined the charge of mass ratio to electrons
Rutherford found alpha, beta, and gamma rays in radiation
Niels Bohr proposed a new atomic theory
Niels Bohr proposed a thoery of the atomic structure stating that the outer orbit of an atom could hold more than the inner orbit
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