Assertion: atom's proton | /r/PartOf | an atom's nucleus
Facets:
Source sentences:
text: Electrons are tiny (0.000549 amu), negatively charged particles that are described as orbiting the protons and neutrons that make up an atom's nucleus, in the manner of planets orbiting the sun.
text: Electrons, which spin around the protons and neutrons that make up the atom's nucleus, constitute a very small portion of the atom's mass.