Democritus

  • Democritus (400BC)
    111

    Democritus (400BC)

    He said that breaking down a tree to where it cant be broken down anymore. If you break a substance down to where it cant be broken down anymore. Atoms are indestructable. First atmoic model.
  • Aristole (320)
    320

    Aristole (320)

    he did not believe in it he taught bout elements. That you'll always have a smaller state of matter.
  • Dalton (1803)

    Dalton (1803)

    ~Things can be broken down into elements
    ~Elenments are atoms with diffrent mass
    ~Compounds are a combination of elements
  • Bohr(1911)

    Bohr(1911)

    Electrons are small & negativty charged
    ~Protons are in the nuclear with is small compared the size of the atom
    ~For a particular element only certain freqencis of light is absorded.
  • Thomson  (1913)

    Thomson (1913)

    That the atom had elements it is different on the inside has more particles.
  • Rutherford (1911)

    Rutherford (1911)

    known as the father of nuclear physics
    Gold Foil Experiment
  • Heisenburg&Schrodinger (1925)

    Heisenburg&Schrodinger (1925)

    electrons didnt orbit the nucleous neither did electrons