CH301H - Principles of Chemistry I: Honors
Fall 2015, Unique 49310

Lecture Summary, 22 September 2015

Bohr Model of the Atom:  In 1913, Bohr attempted to define a model to explain the stable atom.  He started with two assumptions: 1) an electron orbits around a positively charged nucleus according to Rutherford's planetary model, and 2) the angular momentum of the orbiting electron is quantized.  From these two postulates, he derived an expression for the energy of a one-electron atom based only on constants and the "quantum number" n.  The derivation of this expression is given here:

Bohr Model

The Bohr model was able to explain the ionization energies and observed emission spectra of one-electron atoms.