Assertion: gold's isotope | /r/HasProperty | radioactive
Facets:
Source sentences:
text: Gold was synthesized from mercury by neutron bombardment in 1941, but the isotopes of gold produced were all radioactive.
text: An American team, working without knowledge of Nagaoka's prior study, conducted the same experiment in 1941, achieving the same result and showing that the isotopes of gold produced by it were all radioactive.