Assertion: plutonium's isotope | /r/HasProperty | separated
Facets:
value: from non-fissionable isotopes
type: OTHER
Source sentences:
text: Third, fissionable isotopes of plutonium must be separated from non-fissionable isotopes, which is more difficult than separating fissionable from non-fissionable isotopes of uranium, not least because the mass difference is one atomic unit instead of three.