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Atomic Theory

By Alezandr.678323
  • 460

    Democritus (BC)

    Democritus (BC)
    Democritus fromulated the atomic theory of the universe.

  • John Dalton

    John Dalton
    John Dalton developed the Atomic theory, Law of Multiple Proportions, Dalton's Law of Partial Pressures, and Daltonism.

  • Eugen Goldstein

    Eugen Goldstein
    Goldstein used a CRT to study "canal rays" which had electrical and magnetic properties opposite of an electron.

  • Robert Millikan

    Robert Millikan
    Millikan condcuted the oil drop experiment and determined the charge (e=1.602 x 10 -19 coulomb) and the mass (m = 9.11 x 10 -28 gram) of an electron.

  • Ernest Rutherford

    Ernest Rutherford
    Rutherford studied radiations emitted from uranium and thorium and named them alpha and beta.

  • James Chadwick

    James Chadwick
    Using alpha particles, Chadwick discovered a neutral atomic particle with a mass close to a proton.

  • J.J. Thompson

    J.J. Thompson
    Thompson discovered the electron

  • Aristotle (BC)

    Aristotle (BC)
    Aristotle rejected Plato's tyheory of forms and made many andvances in ancient science.