discovery of the atom

Timeline created by depoye
  • Dalton(Solid Sphere model)

    Experiments with gases that first became possible at the turn of the nineteenth century led John Dalton in 1803 to propose a modern theory of the atom based on the following assumptions.
  • Thomson(Plum Pudding model)

    Thomson, who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model
  • Rutherford(The Nuclear model)

    Ernest Rutherford discovered the nucleus of the atom in 1911
  • Bohr(The Bohr (Planetary) model)

    In 1913, Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.
  • Shrodinger(Quantum Mechanics Model)

    His great discovery, Schrödinger's wave equation, was made at the end of this epoch-during the first half of 1926. It came as a result of his dissatisfaction with the quantum condition in Bohr's orbit theory and his belief that atomic spectra should really be determined by some kind of eigenvalue problem.
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