Atom Timeline

Timeline created by Katie News
  • Lavosier

    Lavosier
    Discovered the law of conservation of matter in chemical reactions, which stated that matter cannot be created or destroyed in an isolated system. He also stated that elements and compounds are two different things.
  • Couloumb

    Couloumb
    Stated that the force between two charges is proportional to the product of the charges.
  • Dalton

    Dalton
    Created the atomic theory: all matter is composed of atoms
  • Crooks

    Crooks
    Created the Crooks tube which demonstratrated cathode rays that travel in straight lines and create heat when they hit certain materials.
  • JJ Thomson

    JJ Thomson
    Discovered the electron and the plum pudding model of an atom.
  • Curies

    Curies
    The Curies discovered polonium and radium.
  • Planck

    Planck
    Planck created quantum theory which states that
  • Einstein

    Einstein
    Stated that light was created from different particles, and introduced the theory of relativity.
  • Millikan

    Millikan
    Discovered the electric charge of an electron...negative.
  • Rutherford

    Rutherford
    Rutherford discovered that all the mass of an atom is a small positivley charged ball in the middle of the atom.
  • Bohr

    Bohr
    Bohr stated that the electrons in an atom moved around the nucleus in big orbits. He also introduced the Bohr atomic model.
  • Geiger

    Geiger
    He created the first detector of alpha particals and other radiation.
  • Shrodinger

    Shrodinger
    Created the Shrodinger equation: describes the form of the probability waves that show the motion of small particles and how the waves are changed by outside influences.
  • Chadwick

    Chadwick
    Chadwick discovered the neutrally charged neutron.
  • Hahn

    Hahn
    Discovered nuclear fission where an atom breaks apart into two seperate nuclei. He also experimented with uranium.