Question

Question #8fd31

Answer 1

None. The Pauli exclusion principle states, in effect, that no two fermions can occupy the same quantum state.

Explanation:

The confusion often arises because electrons are paired in orbitals, so they appear to have the same energy, momentum etc. but this ignores the fact that they will have opposing spins (`+1/2 and -1/2` in arbitrary units) so different spin quantum numbers.