Atomic Theory scientists

By samira

  • newton

    discovers theory of light and colour, Proposed a mechanical universe with small solid masses in motion.

  • dalton

    Has the idea of fixed ratio combinations and valencies.

  • G.J. Stoney

    discovers electricity is made of negative particles- electrons.

  • J.J. Thomson

    creates a model of a solid atom- negatively charged electrons are embedded in a positive sphere.

  • Planck

    Quantum theory-interaction between matter and radiation.

  • Nagaoka

    discovers that electrons revolve around the positively charged centre of the atom.

  • Milikan

    discovers the measurement of the charge of an electron.

  • E. Rutherford

    Described the atom as having a central positive nucleus surrounded by negative orbiting electrons. Gold foil experiment.

  • H.G.J. Mosely

    finds out that all positive charges are in the atom.

  • Bohr

    Depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus with electrostatic forces providing attraction.

  • James Chadwick

    Discovered the neutron.