Assertion: hydrogen atom's proton | /r/HasProperty | fermion
Facets:
Source sentences:
text: Protons and neutrons are fermions, with different values of the strong isospin quantum number, so two protons and two neutrons can share the same space wave function since they are not identical quantum entities.
text: This is because protons and neutrons are fermions, which according to the Pauli exclusion principle cannot exist in the same nucleus in exactly the same state.