Assertion: plutonium | /r/Synonym | a transuranium element
Facets:
Source sentences:
text: Plutonium is also called a transuranium element.
text: Plutonium is a transuranic element.
text: Plutonium is the transuranium element that is most abundant in the environment, due to the atmospheric testing of nuclear weapons during the 1950s and 1960s that deposited approximately 4.2 tons of plutonium in the environment.
text: Plutonium is also called a transuranium element.