Atomic Theory

Timeline created by MyrandaLeannnn
In History
  • 400

    Democritus

    Democritus
    Founded the atom
  • Whilhelm Roentgen

    Whilhelm Roentgen
    Discovered the X-Ray
  • J.J. Thomson

    J.J. Thomson
    He was experimenting the interior of an atom when he discovered that there are very small pieces of atoms inside an atom, which he called “corpuscles”.
  • Ernest Rutherford

    Ernest Rutherford
    Discovered that the nucleus has a positive charge and it it very dense
  • Francis William Aston

    Francis William Aston
    Discovered isotopes
  • James Chadwick

    James Chadwick
    Proved the existence of a neutron
  • John Douglas

    John Douglas
    Split the first atom
    -Lead to the atomic bomb that ended World War II
  • First Atomic Bomb dropped

    First Atomic Bomb dropped
    Finished World War II
  • Karl Ferdinand Braun

     Karl Ferdinand Braun
    Invented the first cathode ray tube
    - A vacuum tube that is used to veiw images and is used to make X-Rays.