Assertion: atom's proton | /r/PartOf | the nuclide
Facets:
Source sentences:
text: A student argues that the mass of the Be-9 nuclide must equal the sum of the individual protons and neutrons that make up the nuclide.
text: The mass of the Be-9 nuclide must equal the sum of the individual protons and neutrons that make up the nuclide.