Assertion: californium | /r/HasAspect | 20 isotopes
Facets:
value: with mass numbers
type: OTHER
Source sentences:
text: Isotopes: Californium has 20 isotopes whose half-lives are known, with mass numbers 237 to 256.
text: Californium has 20 isotopes whose half-lives are known, with mass numbers 237 to 256.
text: Californium has 20 isotopes with known half-lives and mass numbers ranging from 237 to 256.