Assertion: atom's particle | /r/HasAspect | the same
Facets:
value: as protons
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: 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: Early on it was thought the other six nuclear particles would have the same mass as protons but be neutrally charged: neutrons.
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.