Assertion: krypton's isotope | /r/AtLocation | the earth's crust
Facets:
value: by breakdown of uranium and plutonium
type: CAUSE
value: at a very small %
type: OTHER
Source sentences:
text: 20.786 J/mol K 0.000108-0.000114% of atmosphere 6 Stable isotopes Produced by breakdown of uranium and plutonium in the earth's crust at a very small %