Assertion: astatine's isotope | /r/HasProperty | bombarded with alpha particles
Facets:
value: from the nuclei of the isotope
type: OTHER
value: in this process
type: TEMPORAL
Source sentences:
text: -When a bismuth isotope is bombarded with alpha particles, it becomes astatine.
text: In this process, the bismuth isotope, number 209, is bombarded with alpha particles from the nuclei of the isotope, number 4, of helium.