Assertion: plutonium's isotope | /r/HasAspect | the longest half-life
Facets:
Source sentences:
text: The isotope that has the longest half-life is 244Pu (or plutonium-244).
text: The isotope that has the longest half-life is 244Pu (or plutonium-244).
text: The isotope that has the longest half-life is 244Pu (or plutonium-244).