Assertion: atom's electron | /r/HasProperty | proton
Facets:
Source sentences:
text: Then, because electrons are leptons, and protons, and neutrons are made of quarks, this definition in turn leads to the definition of matter as being "quarks and leptons", which are two of the four types of elementary fermions (the other two being antiquarks and antileptons, which can be considered antimatter as described later).
text: Is it possible for the atom of an element to have one electron, one proton and no neutron.