Assertion: thorium | /r/HasAspect | longer half-life
Facets:
value: very long
type: DEGREE
Source sentences:
text: ’s crust, reflecting the fact that thorium has a longer half-life.
text: Radium nevertheless still occurs in the environment, as the isotopes 223Ra, 224Ra, 226Ra, and 228Ra are part of the decay chains of natural thorium and uranium isotopes; since thorium and uranium have very long half-lives, these daughters are continually being regenerated by their decay.