Assertion: osmium's isotope | /r/HasAspect | long half-life
Facets:
value: extremely
type: DEGREE
Source sentences:
text: The radioactive isotope of osmium is osmium-186 and has a very long half-life (2 × 1015 years).
text: Since both parental isotopes have extremely long half-lives, the Os-isotope rich reservoir must be very old to allow enough time for the daughter isotopes to form.
text: The other natural isotope, 186Os, has an extremely long half-life (2×1015 years) and for practical purposes can be considered to be stable as well.
text: The other natural isotope, 186Os, has an extremely long half-life (2×1015 years) and for practical purposes can be considered to be stable as well.