Assertion: hydrogen atom's nucleus | /r/CapableOf | form proton
Facets:
Source sentences:
text: Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
text: Two helium-3 nuclei then react to form an alpha particle, or helium-4 nucleus, and two protons.