Atomic Theory Timeline

By kirby10
  • 300

    Democritus

    called particles of matter atoms

  • John Dalton

    John Dalton
    proposed atomic theory as sperical solid masses in motion.

  • J.J. Thompson

    J.J. Thompson
    described an atom as a ball of positive charges containing a munber of electrons

  • Ernest Rutherford

    Ernest Rutherford
    determined that the nucleus of the atom is very dense and has a positive charge

  • Neils Bohr

    Neils Bohr
    explained the atomic structure of an atom as "successive orbital shell of electrons."

  • Schrodinger

    Schrodinger
    identified the electron cloud model as the probable location of moving elements.

  • James Chadwick

    James Chadwick
    discovered the neutron

  • Cockcroft and Walton

    Cockcroft and Walton
    Cockroft and Walton were the first people to split the atom.

  • Manhattan project

    Manhattan project
    The manhattan project was an underground project formed by the U.S. to create the atomic bomb.

  • Atomic Bomb

    Atomic Bomb
    The atomic bomb was dropped on Japan to end WWII.

  • Chernobyl Disaster

    Chernobyl Disaster
    A nuclear reactor accident caused the plant to explode.