Assertion: uranium's isotope | /r/PartOf | primordial nuclides
Facets:
Source sentences:
text: On the other hand these isotopes (except 234U) belong to primordial nuclides, because their half-life is comparable to the age of the Earth (~4.5×109 years for 238U).
text: On the other hand these isotopes belong to primordial nuclides, because their half-life is comparable to the age of the Earth (~4.5×109 years for 238U).