Assertion: uranium's number | /r/HasProperty | equal
Facets:
value: to the number of thorium-230
type: OTHER
value: at secular equilibrium
type: OTHER
Source sentences:
text: At secular equilibrium, the number of thorium-230 decays per year within a sample is equal to the number of thorium-230 produced, which also equals the number of uranium-234 decays per year in the same sample.[citation needed]