Assertion: astatine's isotope | /r/HasProperty | identified
Facets:
Source sentences:
text: Isotopes: More than 30 isotopes of astatine have been identified.
text: More than 30 isotopes of astatine have been identified.
text: More than 30 isotopes of astatine have been identified.
text: More than 30 isotopes of astatine have been identified.