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Atomic Model

By noemie22
  • Democritus

    Democritus

    460 BC
    - Developed idea of the atom.
    - Called them "Atoma" Meaning invisible in greek.
  • Aristotle

    Aristotle

    460 BC
    -Thought entire universe is made up of 5 elements.
    -Matter is NOT made up of tiny particles.
  • John Dalton

    John Dalton

    1808
    -All matter made up of tiny spheres, able to bounce around , called atoms.
  • J.J. Thompson

    J.J. Thompson

    1898
    -Atom has a negative charge
    -Created "plum pudding" model
  • Robert Millikan

    Robert Millikan

    1908
    -Performed "oil-drop" experiment
    -Said an electron = 1.59X10(-19)
  • Ernest Rutheford

    Ernest Rutheford

    1910
    -"Gold Foil" expirement
    -Most mass is in mucleus
    -created nuclear model