Assertion: electron | /r/HasProperty | ♠0.511 mev/c2
Facets:
Source sentences:
text: — the mass of an electron (6999511000000000000♠0.511 MeV/c2) and the mass of a muon (with a value of 7002105700000000000♠105.7 MeV/c2) are fractions of the mass of the "heavy" proton (7002938300000000000