ATOMIC THEORY TIMELINE

By glynncas000
  • Period: 300 to

    Atomic theory timeline

  • 347

    Aristotle

    Aristotle believed that atoms did not exist.

  • John Dalton

    John Dalton
    Dalton created the atomic model and proved that atoms exist as a solid sphere, although he had no knowledge of protons and neutrons.

  • JJ Thomson

    JJ Thomson
    Thomson conducted the Cathode Ray Tube Experiment and proved that atoms have electrons with a negative charge.

  • Ernest Rutherford

    Ernest Rutherford
    Rutherford conducted the Gold Foil Experiment and proved that the center of the atom is dense and has a positive charge.

  • Niels Bohr

    Niels Bohr
    Bohr created the Electron Cloud Model and proved that electrons travel around the nucleus in a cloud.

  • Erwin Schrodinger

    Schrodinger explained the movement of electrons in an atom.

  • James Chadwick

    Chadwick discovered the neutron.

  • Werner Karl Heisenberg

    Heisenberg created the neutron-proton model of the nucleus.

  • Democtcritus

    Democritus believed that atoms are indivisible.