Assertion: xenon's isotope | /r/HasProperty | known nuclide
Facets:
value: heaviest
type: DEGREE
Source sentences:
text: The shortest-lived isotope, 108Xe, has a half-life of 58 μs, and is the heaviest known nuclide with equal numbers of protons and neutrons.
text: It has nine stable isotopes and seven known radioactive isotopes.