Assertion: radon's life | /r/HasProperty | 2,000 times that of radon
Facets:
Source sentences:
text: At this stage, the predominant residual activity originates from the radon decay product 210Pb, whose half-life (22.3 years) is 2,000 times that of radon (and whose activity is thus 1/2,000 of radon's), and its descendants 210Bi and 210Po.