Atomic Theory Time Line

  • Antoine Lavoisier

    Antoine named oxygen and proposed the Law of Conversation of Mass which represents the beginning of modern chemistry
  • JJ Thomson

    3 Experiments 1 Big Idea Thomson described atoms as ball of + charge containing a number of electron, discovered the electron.
  • Robert Milikan

    figured out that the mass of an electron was very small and that the overall charge of an atom is neutral.