Atomic Model Timeline

By alyshafox
  • 101

    Democritus

    Democritus
    Believed that all matter consisted of extremely small particles that could not be divided.

  • John Daltonc atomic thorey

    John Daltonc atomic thorey
    All matter is made up of individual particles called atoms, ehich cannot be divided.

  • J.J. Thomson

    J.J. Thomson
    First evidence that atoms are made of even smaller particles.

  • Hantaro Nagaoka atomic theory

    Hantaro Nagaoka atomic theory
    Atoms have a central nucleus. Electrons move in orbit like the rings around Saturn.

  • Ernest Rutherford atomic theory

    Ernest Rutherford atomic theory
    Atom has a dense, positively charged nucleus. Electrons move randomly in the space around the nucleus.

  • Niels Bohr atomic theory

    Niels Bohr atomic theory
    Electrons move in spherical orbits at fixed distances from the nucles.

  • Werner Heisenbery & Erwin Schodinger atomic theory

    Werner Heisenbery & Erwin Schodinger atomic theory
    Describe te possible locations of electrons around the nucleus.

  • James Chadwick atomic theory

    James Chadwick atomic theory
    Existence of neutrons that have no charge. Atomic nuclei contain neutrons and positively charged protons.