Assertion: actinium's isotope | /r/HasAspect | short half-lives
Facets:
value: very
type: DEGREE
Source sentences:
text: The other seven isotopes of actinium have very short half-lives ranging from 10 days to less than 1 min.
text: The other seven isotopes of actinium have very short half-lives ranging from 10 days to less than 1 min.