Assertion: big bang theory | /r/CapableOf | cool for element
Facets:
value: as electrons
type: MANNER
value: as protons
type: MANNER
value: sufficiently
type: DEGREE
Source sentences:
text: As the matter and radiation expanded, so the theory says, it cooled sufficiently for elements to form, as protons and electrons combined to form hydrogen of atomic weight one, and neutrons were subsequently captured to form helium of atomic weight four.