Assertion: plutonium | /r/HasProperty | discovered
Facets:
Source sentences:
text: Plutonium was the second transuranium actinide to be discovered.
text: Plutonium was the second transuranium element of the actinide series to be discovered.
text: Plutonium was the second transuranium element of the actinide series to be discovered.
text: Named for the planet Pluto, plutonium was the second transuranium element to be discovered.
text: Plutonium was the second transuranium element of the actinide series to be discovered.
text: As the plutonium was produced in the nuclear reactors at Hanford, Washington, it was discovered that the plutonium was not as pure as the initial samples from Lawrence's Radiation Laboratory.