Assertion: neptunium's isotope | /r/HasProperty | produced
Facets:
Source sentences:
text: Radioactive isotopes are produced when very small particles are fired at atoms.
text: research isotope 245Cm can be obtained from the α-decay of 249Cf, and the latter isotope is produced in minute quantities from the β−-decay of the berkelium isotope 249Bk.
text: Radioactive isotopes are produced when very small particles are fired at atoms.