A. Chapman famous dead guy

By austin.chapman
  • 101

    Thales 624 B.C.

    Thought all things were made of water.
  • 101

    Democritus--400B.C.

    first person to think of the atom. thougt it was a solid sphere.
  • 101

    Aristotle--384 B.C.

    Didnt believe in the Atomic Theory. Believed all substances were made of fire, water, earth, and air.

  • Newton

    He agreed with democritus

  • Dalton

    atomic theory, first to have experimental evidence.

  • Henri Becquerel

    Discovered reactivity, couldn't explain it.

  • Joseph John Thomson

    Discovred the electron, cathode ray experiments.

  • Ernest Rutherford

    discovered the nucleus, golf foil experiment.

  • Millikan

    oil drop experiment, found the charge of an electron

  • Niels Bohr

    Created the bohr model, though electrons orbited around the nucleus.

  • Ervin Schrodinger

    atomic model was the quantum mechanical model.

  • James Chadwick

    Proved the existence of neutrons.