# Question #f7b59

Aug 1, 2017

The Bohr-Rutherford MODEL is the circular orbit of electrons around a nucleus. The Bohr Hypothesis is how that is all held together by electrostatic forces rather than gravity.

#### Explanation:

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Bohr Quantum Hypothesis
The angular momentum of an electron is quantized by
$L = {m}_{e} v r = n h$
where ${m}_{e}$ is the electron mass, v is its velocity, r is its orbital radius, n is a positive integer known as the principal quantum number, and is h-bar.
http://scienceworld.wolfram.com/physics/BohrQuantumHypothesis.html

This is related to the Bohr Model of the hydrogen atom.
http://scienceworld.wolfram.com/physics/BohrModel.html