AtomicTheory Time Line

  • 400

    democritus

    He found the atom.
    400 bc.
  • John Dalton

    Dalton's Atomic Theory
  • J. Plucker

    Cathode Ray Tube
  • J.J. Thomson

    Discovered the electron
  • Niels Bohr

    Bohr Planetary Model
  • Ernest Rutherford

    Gold Foil Experiment Model / Rutherford Model

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