# How many electrons are allowed to share the same quantum state according to the Pauli Exclusion Principle?

Jul 31, 2017

Two.

#### Explanation:

One can have "spin up" with the spin quantum number ${m}_{s} = + \frac{1}{2}$, the other would then have "spin down" with ${m}_{s} = - \frac{1}{2}$. The Pauli Exclusion Principle allows that but no more.

Jul 31, 2017