Assertion: krypton | /r/MadeOf | only one radioactive isotope
Facets:
Source sentences:
text: After it has been stored a few days, krypton obtained by nuclear fission contains only one radioactive isotope , krypton-85, which has a half-life of 10.8 years, because all the other radioactive isotopes have half-lives of 3 hours or less.
text: After it has been stored a few days, krypton obtained by nuclear fission contains only one radioactive isotope, krypton-85, which has a half-life of about 10 years, because all the other radioactive isotopes have half-lives of three hours or less.