Assertion: technetium's isotope | /r/HasProperty | discovered by italian mineralogist
Facets:
value: in a sample of molybdenum
type: LOCATION
Source sentences:
text: The isotope technetium-97 (4,210,000-year half-life) was discovered (1937) by the Italian mineralogist Carlo Perrier and the Italian-born American physicist Emilio Segrè in a sample of molybdenum that had been bombarded by deuterons in the Berkeley (California) cyclotron.