Evolution of Atomic Models: From Democritus to Bohr
Explore the timeline of atomic models from Democritus to Bohr, including key contributions by Dalton, Rutherford, Schrodinger, and more. Learn about Bohr's model and postulates, orbital radius, energy level diagrams for hydrogen, and wavelengths of the Balmer series.
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Presentation Transcript
Atomic Model: Timeline Democritus Dalton Thompson Rutherford Bohr Schrodinger Chadwick
Bohr Model Bohr's theory begins with Rutherford's picture of an atom as a nucleus surrounded by electrons moving in circular orbits. In his theory, Bohr made a number of assumptions and combined the new quantum ideas of Planck and Einstein with the traditional description of a particle in uniform circular motion. Bohr s Postulates: 1. Electrons in stationary orbits do not radiate. 2. The atom radiates energy as photon when it transition to lower energy.
