Assertion: proton | /r/HasAspect | observed mass of 235.04393
Facets:
Source sentences:
text: U-235 has 92 protons, 143 neutrons, and has an observed mass of 235.04393 amu.
text: U-235 has 92 protons, 143 neutrons, and has an observed mass of 235.04393 amu.