Syd Atomic Theory Timeline

By shurdle09200920
  • 460 BCE

    Democritus

    Developed concept of atom.
  • 338 BCE

    Aristotle

    Made significant and lasting contributions to nearly every aspect of human knowledge.

  • Antoine Lavoisier

    Recognized oxygen and hydrogen.

  • Joseph Louis Proust

    Discovered law of constant composition.

  • John Dalton

    Identified the hereditary nature of red-green color blindness.

  • Michael Faraday

    Contributed to study of electromagnetism and electrochemistry.

  • Henri Becquerel

    Studied properties of x-rays which had been discovered in 1895

  • J.J. Thomson

    Performed a series of experiments in 1897 designed to study nature or discharge in a high-vacuum cathode-ray tube.

  • Marie & Pierre Curie

    They studied radioactivity. They discovered radium and polonium.

  • Ernest Rutherford

    Series of discoveries in the field or radioactivity and nuclear physics. He discovered beta and alpha rays.

  • Robert Millikan

    Discovered size or charge on an electron

  • Niels Bohr

    Electrons revolve in stable orbits around atomic nucleus.

  • Max Planck

    Discovered energy quanta.

  • James Chadwick

    Discovery of neutron.

  • Albert Einstein

    Invented the atomic bomb.