Assertion: rutherfordium's isotope | /r/HasProperty | identified
Facets:
value: so far
type: OTHER
Source sentences:
text: Six isotopes of rutherfordium have so far been identified.
text: Rutherfordium has 12 recognized isotopes with known half-lives.
text: As of January 1995 it was thought that eleven isotopes of Element 104 had been identified.