Images (4)

Atomic Theory

  • Cathode Ray Tube Expirement

    Cathode Ray Tube Expirement
    One of JJ Thompson's idea
  • Ernest Rutherford

    1871-1937 Nuclues theory of 1910, alpha particle gold foil expirement. An atom's mass is mostly in the nucleus. Nucleus has a positive charge.
  • Rutherford Model

    Rutherford Model
  • Niels Bohr

    Niels Bohr
    1885-1962 Planetary model 1913. Nucleus is surronded by electrons at different energy levels. Utilized Plack's Quantum Energy theory. Worked on the Manhattan Project(US atomic bomb)
  • Ernst Schodinger 1887-1961 Werner Heisenberg 1901-1976

    Quantum Mechanical Model 1962
    Electrons are in probability zones called orbitals, not orbits, they can't be pinpointed in location. Electrons are particles and waves at the exact same time. Developed quantum number bassed on theories of Einstein and Planck
  • Democritus

    First concept of an Atom was invented in 460 - 370 B.C
  • John Dalton

    John Dalton
    1766-1844 Dalton's model. Each one of the element is composed of extremlly small particles called atoms. All the atoms of a given element are identicial but they are different from those of any other element. Atoms are neither created or destroyed in any chemical reaction.
  • J.J Thompson

    J.J Thompson
    He discovered electrons 1897 – Cathode Ray Experiment
    Plum Pudding Model 1904
    Electrons in a soup of positive charges
    Discovered Isotopes 1913
  • Plum Pudding model

    Another one of JJ Thompson's idea