Assertion: plutonium's isotope | /r/HasProperty | created
Facets:
value: by bombarding uranium
type: MANNER
Source sentences:
text: The first isotope of Plutonium, Pu-238, was created by bombarding uranium with deuterons in a cyclotron at Seaborg's lab in California and the second, Pu-239 was created in a similar fashion by Seaborg, in 1941.