Evolution of the Atomic Model

By josieseavey

  • Dalton Model

    John Dalton pictures atoms as tiny, indestructible particles, with no internal structure.

  • Thomson Model

    J.J. Thomson, a British scientist, discovers the electron. Then later leads to his "plum-pudding model". He pictures electrons embedded in a sphere of positive electrical charge.

  • Hantaro Nagaoka

    Hantaro Nagaoka, A Japanese physicist, suggests that an atom has a central nucleus. Electrons move in orbits like rings around then sun.

  • Rutherford model

    New Zealand physicist Ernest Rutherford finds that an atom has a small, dense, positively charged nucleus. Electrons move around the nucleus.

  • The Bohr Model

    Niels Bohr changed Rutherford's model to include newer discoveries about how the energy of an atom changes when it absorbs or emits light.