Assertion: actinium's isotope | /r/HasAspect | half-lives
Facets:
value: under 10 hours
type: TEMPORAL
Source sentences:
text: All other isotopes have half-lives under 10 hours, and most under a minute.
text: All other isotopes have half-lives under 10 hours, and most under a minute.
text: These isotopes nevertheless still have half-lives too short to be primordial radionuclides and only exist in nature from these decay chains.