Assertion: astatine | /r/HasProperty | discovered by d. corson
Facets:
value: by bombarding a bismuth target
type: MANNER
value: in 1940
type: TEMPORAL
Source sentences:
text: Astatine was discovered by D. Corson and co-workers in 1940 by bombarding a bismuth target with alpha particles.
text: Astatine was discovered by D. Corson and co-workers in 1940 by bombarding a bismuth target with alpha particles.