dipity

A timeline of discovery of atomic theory

Created by timargall on 12/09/2008

Last updated: 12/03/10 at 16:35

• Dipity Timeline Created
  12 Sep 2008 11:58

• Neutron first proposed
  1912

  Ernst Rutherford first suggested a neutral (uncharged) particle existed

• Discovery of the electron
  1899

  by JJ Thomson

• Dalton Theory
  1809

  by John Dalton - this theory described how atoms interacted to form compounds, but never even considered the possibility of subatomic particles