History of an Atom

By Taylorbryant187
  • 465 BCE

    Democritus

    Democritus
    This hypothesis was created in 465BC.
    All matter consists of invisible particles called atoms.
    He created the model of an atom.
  • 465 BCE

    Democritus

    Democritus
    This hypothesis was created in 465BC.
    All matter consists of invisible particles called atoms.
    He created the model of an atom.

  • Dalton

    Daltons atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. All matter is made of atoms. October 1803

  • Thompson

    Development of the Atomic Theory. In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged.

  • Rutherford

    In 1911, Ernest Rutherford and his colleagues discovered the nucleus of the atom using their famous gold foil experiment. They shot alpha particles at a sheet of gold foil, and noticed that most went through, but some bounced bacK.

  • Bohr

    Bohr
    In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus