History of the Atom: Akshara

By PMurphy
  • Aristole
    400

    Aristole

    Aristole stated that all subtances are made up of four elements which are: Air,Earth, Fire, and Wind
  • Democritus
    400

    Democritus

    Democritus proposed that all matter incliding air and space is made up of atoms.
  • John Dalton

    John Dalton

    Transformed ideas of an atom into a compound
  • J.J Thompson

    J.J Thompson

    Thompson discovered the electron and to prove his statement he used th Cathode Ray tube Experiment.
  • Robert Millikan

    Robert Millikan

    Determind the charge and size of the elctron. Using the Oil Drop Experiment.

  • Ernest Rutherford

    Ernest Rutherford discovered the alpha and beta rays.
  • Neils Bohr

    Neils Bohr

    Proposed that an energylevel is found only in specifc circular paths, or orbits around the electrons
  • Sir James Chadwick

    Sir James Chadwick

    Confirmed the existences of the neutron to the atomic theory