Assertion: diatomic astatine | /r/HasProperty | radioactive element
Facets:
value: with an atomic number of 85
type: OTHER
value: highly
type: DEGREE
Source sentences:
text: Astatine Astatine is a highly radioactive element and it is the heaviest known halogen.
text: Astatine - Astatine is a radioactive element with an atomic number of 85 and