The History of atomic model

By Enaamwaseem
  • 500 BCE

    Discovery of atoms

    Democritus discovered atoms. It was a guess and couldn't be tested because of limited amount of technology

  • Development of the theory of atoms

    Dalton developed his theory of atoms and matter. Daltons experiments and measurements allowed him to support his hypothesis with evidence.

  • Discovery of electrons

    JJ Thomson discovered the electron using Experiment using electric charges in cathode ray tubes.

  • Planetery model of atom

    Rutherford developed the planetary model of the atom.
    Experiment using alpha particles fired at thin gold foil and

  • New version of the model of atom

    Bohr developed a model of the atom.
    Bohr used mathematical models and laws

  • Discovery of nuetron

    The neutron was discovered by James Chadwick.
    Experiments using kinematics and accurate measurements lead to proving the existence of a previously undetected subatomic particle, the neutron.