Assertion: polonium's isotope | /r/HasProperty | known with atomic masses
Facets:
Source sentences:
text: Twenty five isotopes of polonium are known, with atomic masses ranging from 194 to 218.
text: Isotopes Twenty five isotopes of polonium are known, with atomic masses ranging from 194 to 218.
text: Twenty five isotopes of polonium are known, with atomic masses ranging from 194 to 218.
text: Twenty nine isotopes of Polonium are known, with atomic masses ranging from 194 to 218.