Assertion: thorium | /r/AtLocation | single isotopic form
Facets:
Source sentences:
text: Thorium exists in nature in a single isotopic form – Th-232 – which decays very slowly (its half-life is about three times the age of the Earth).
text: Thorium occurs in the form of a single isotope, Th-232, which degenerates at a very slow rate.
text: Thorium exists in nature in a single isotopic form – Th-232 – which decays very slowly its half-life is about three times the age of the Earth.