Assertion: uranium's life | /r/HasProperty | 4.468 billion years
Facets:
Source sentences:
text: Uranium is weakly radioactive and remains so because of its long physical half-life (4.468 billion years for uranium-238).
text: It is weakly radioactive and remains so because of its long physical half-life (4.468 billion years for uranium-238).
text: It is weakly radioactive and remains so because of its long radioactive half-life (4.468 billion years for uranium-238, 700 million years for uranium-235).