Atomic Timeline

By poptartmonster
  • 460

    Democritus

    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

    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.