Assertion: atom's particle | /r/Synonym | gluon
Facets:
Source sentences:
text: They solved this by finding a particle called a gluon.
text: Quarks with unlike color charge attract one another as a result of the strong interaction, and the particle that mediated this was called the gluon.
text: Protons and neutrons are both composed of other particles called quarks and gluons.