Assertion: atom | /r/HasAspect | the same
Facets:
value: as the proton
type: OTHER
value: in theory
type: OTHER
Source sentences:
text: These particles emitted had the same mass as protons and the relative mass of such a particle was 1 a.m.u.
text: Dalton believed that all atoms of the same element have the same mass.
text: In theory, a particle and its anti-particle (for example, proton and antiproton) have the same mass, but opposite electric charge and other differences in quantum numbers.
text: Gamma radiation can’t deflect protons this way, so Chadwick realised the particles in question here must have the same mass as the proton but lack its electrical charge: they were neutrons.