Mason W.

  • 460


    Greek philosipher who discovered or hypothesized the atomic theory that every thing is made up of atoms. 460-370 B.C.
  • John Dalton

    John Dalton
    John Dalton developed the first useful atomic theory of matter around 1803. In the course of his studies on meteorology, Dalton concluded that evaporated water exists in...
  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford, 1st Baron Rutherford of Nelson OM PC FRS, widely referred to as Lord Rutherford, was a chemist (B.Sc. in chemistry and geology 1894, Canterbury College, he is creddited to discovering the proton.
  • JJ Thomson

    JJ Thomson
    In 1897 in Cambridge, J J Thomson experimented on cathode rays. In Britain, physicists had argued these rays were particles, but German physicists disagreed, thinking the...
  • Neils Bohr

    Neils Bohr
    Niels Henrik David Bohr was a Danish physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel in 1922.
  • Shrodinger and de Broglie

    Shrodinger and de Broglie
    Identified the electron cloud model as the probable location of moving electrons.
  • Chadwick

    Accredited to discovering the neutron.
  • Enrico Fermi

    Enrico Fermi
    Fermi and his colleagues in Rome studied the results of bombarding uranium with neutrons in 1934.
  • Nuclear Fission

    Nuclear Fission
    In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction in which the nucleus of an atom splits into smaller parts, often producing free neutrons and lighter nuclei, which may eventually produce photons.
  • Cockroft and Walton

    Cockroft and Walton
    discovered how to split atoms.
  • Atomic bomb

    Atomic bomb
    Bomb was dropped on Japan to end WW2.
  • Induced Radioactivity

    Induced Radioactivity
    Induced radioactivity occurs when a previously stable material has been made radioactive by exposure to specific radiation. Most radioactivity does not induce other materials to become radioactive.
  • Curie Family

    Curie Family
    In 1934, Irene Curie, the daughter of Pierre and Marie Curie, and her husband, Frederic Joliot, announced the first synthesis of an artificial radioactive isotope. They bombarded a thin piece of aluminum foil with -particles produced by the decay of polonium and found that the aluminum target became radioactive. Chemical analysis showed that the product of this reaction was an isotope of phosphorus.