Atomic structure

  • 442

    Democritus

    Democritus
    Democritus proposed the first idea of the atom; "by convention bitter, by convention sweet, but in reality atoms and void."
  • Period: 442 to

    Atomic structure influences

  • Antoine Lavoisier

    Antoine Lavoisier
    Discovery of the role oxygen plays in combustion. He recognized and named oxygen and hydrogen
  • John Dalton

    John Dalton
    Proposed an atomic theory with spherical solid atoms based upon measurable properties of mass.
    - All matter is made up of atoms
    - Atoms of the same element are the same
  • JJ Thompson

    JJ Thompson
    Discovery of the electron
  • Robert Milikan

    Robert Milikan
    Won the Nobel Prize for physics for his work on the photoelectric effect and measuring the charge of the electron.
  • Niels Bohr

    Niels Bohr
    The discovery and creation of the atominc atom, helped aid what we know about atoms and how they function
  • James chadwick

    James chadwick
    Discovered the neutron