Assertion: proton | /r/CapableOf | achieve unusual stability
Facets:
value: for the same reason
type: CAUSE
Source sentences:
text: Some resemblance to atomic orbital models may be seen in a small atomic nucleus like that of helium-4, in which the two protons and two neutrons separately occupy 1s orbitals analogous to the 1s orbital for the two electrons in the helium atom, and achieve unusual stability for the same reason.