Assertion: actinium | /r/CapableOf | emit betaand
Facets:
value: sometimes
type: TEMPORAL
value: predominantly
type: DEGREE
Source sentences:
text: Actinium is found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting betaand sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours.