Assertion: astatine | /r/HasProperty | discovered by nuclear reactions
Facets:
value: in 1940
type: TEMPORAL
value: first time
type: TEMPORAL
Source sentences:
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.
text: Astatine is an extremely rare element - the rarest, very difficult to be identified in natural products; astatine was discovered first time by nuclear reactions between bismuth and high energy alpha particles in 1940 and in 1943 was discovered between the decay products of uaranium, actinium and thorium series.