Assertion: krypton's isotope | /r/HasProperty | produced
Facets:
value: naturally
type: MANNER
Source sentences:
text: Radioactive isotopes of krypton — versions of the atom with differing numbers of neutrons in their nuclei — are produced naturally when cosmic rays from space hit krypton atoms in the atmosphere, said Christo Buizert, a postdoctoral researcher in geology and geophysics at Oregon State University.
text: Radioactive isotopes are produced when very small particles are fired at atoms.
text: About 20 radioactive isotopes of krypton have been produced.
text: Radioactive isotopes are produced when very small particles are fired at atoms.