F577ee86 21a8 4df8 90f5 ccd4e5d69204

History of the Atom

By BlackFriday17
  • 400 BCE

    Democritus

    Democritus
    Experiment he did was finding out the world is made up of empty space and tiny particles. He also contributed too knowing that matter can be broken down infinitely number of times

  • James dalton

    James dalton
    all Matter is made up of smaller atoms

  • JJ Thompson

    JJ Thompson
    Found that charged particles from cathode were negatively charged

  • Ernest Rutherford

    Ernest Rutherford
    Gold foil experiment and he contributed by proving the existence of small matter in the center of atoms

  • Niels Bohr

    Niels Bohr
    The discovery of electron and radioactivity and the models of atoms and he added a contribute of a proposed theory of hydrogen atom based on quantum theory