Assertion: neptunium | /r/HasProperty | unstable to use
Facets:
Source sentences:
text: Where the neptunium 239 produced in 1940 was too unstable to use, quickly transforming into plutonium, Neptunium 237 would be just fine to make an atomic bomb.
text: Where the neptunium 239 produced in 1940 was too unstable to use, quickly transforming into plutonium, neptunium 237 would be just fine to make an atomic bomb.