The Bohr Model of the Hydrogen Atom
Postulates:
1. The H atom has only certain allowable energy levels
2. The atom does not radiate energy while in one of its
stationary states
3. The atom changes to another stationary state
(i.e., the electron moves to another orbit) only by
absorbing or emitting a photon whose energy equals
the difference in energy between the two states
The quantum number is associated with the radius of an electron
orbit; the lower the n value, the smaller the radius of the orbit and
the lower the energy level.
ground state and excited state
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