Atomic Theory Timeline

By history765

  • Dalton

    Dalton
    Dalton was the first scientist to propose the scientific theory of atoms.

  • Thomson

    Thomson
    Thomson discovered electrons through work with the Plum Pudding model.

  • Rutherford

    Rutherford
    Found that the nucleus of an atom is dense with positively charged particles. Came to these conclusions through the Gold foil experiment.

  • Bohr

    Bohr
    thought that electrons orbit the nucleus in different levels of energy called shells.

  • Plank

    Plank
    found that atoms emit energy in small amounts called quanta.

  • Milikan

    Milikan
    helped discover the charge of the electron through the oil drop experiment.

  • Schrodinger

    Schrodinger
    found that the nucleus of an atom is three dimensional

  • Heisenberg

    Heisenberg
    Formulated the uncertainty principle and stated that you cannot determine the position and speed of an electron at the same time.