Assertion: cerium's isotope | /r/HasAspect | half-lives
Facets:
value: between a day
type: TEMPORAL
value: between two weeks
type: TEMPORAL
Source sentences:
text: The unstable isotopes have half-lives of: 136Ce has ˃
text: The isotopes with mass numbers of 129, 131, 132 and 136, have half-lives between a day and two weeks, while most of the other isotopes have half-lives from a few seconds to fractions of a second.