Atomic Timeline

  • 460


    Developed the Atomic Theory
  • Lavoisier

    Developed stoiciometry
  • Proust

    Developed the law of difinate proportion
  • Dalton

    Founded the atomic theory in 1800.
  • Crookes

    Found the chemical thallium and identifyed the first sample of helium.
  • Becquerel

    In 1896 Becquerel discoved natural radioactivity. Alsio he studies the absorbtion of light by crystals. In 1903 he dicovered spontanious radioactivity and won the Nobel Peace Prize
  • Curie

    Found element and named it polonium and in 1896 she found that uranium salts admitted rays similar to x-rays.
  • Thomson

    Developed the plum pudding model
  • Millikan

    Measured the single charge of an electron.
  • Rutherford

    Discovered atoms charged nuclues
  • Bohr

    In 1913 Bohr developed the model of the atom he discovered and named after him.
  • Moseley

    Developed the theory of atomic numbers for a more accurate positioning of the table of elements.
  • Chadwick

    Chadwick proved the existince of nutrons in 1932.