-
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. -
Bohr Model
The Bohr model of the atom was the first that incorporated quantum theory and was the predecessor of wholly quantum-mechanical models.Bohr amended that view of the motion of the planetary electrons to bring the model in line with the regular patterns of light emitted by real hydrogen atoms. By limiting the orbiting electrons to a series of circular orbits having discrete radii, Bohr could account for the series of discrete wavelengths in the emission spectrum of hydrogen.
