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Plum Pudding Model
J. J. Thomson, who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904.
In Thomson's model, the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges, like negatively charged "plums" surrounded by positively charged "pudding".
The 1904 Thomson model was disproved by Hans Geiger's and Ernest Marsden's 1909 gold foil experiment. -
Rutherford model
The Rutherford model is a model of the atom devised by Ernest Rutherford. Rutherford directed the famous Geiger–Marsden experiment in 1909 which suggested, upon Rutherford's 1911 analysis, that J. J. Thomson's plum pudding model of the atom was incorrect. -
bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model or Bohr diagram, introduced by Niels Bohr and Ernest Rutherford in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar to structure to the Solar System, but with ... -
Electron Cloud Model
Electron cloud is an informal term in physics. It is used to describe where electrons are when they go around the nucleus of an atom. The electron cloud model is different from the older Bohr atomic model by Niels Bohr. -
Chadwick Model
Sir James Chadwick, (1891 –1974) was an English physicist and famous for his discovery of Neutron. In 1913 Chadwick worked with Hans Geiger at the Technical University of Berlin and he also worked with Ernest Rutherford. Chadwick discovered a previously unknown particle neutron in the atomic nucleus in 1932.
