Assertion: lr's isotope | /r/HasProperty | reported with atomic masses
Facets:
value: from 253
type: TEMPORAL
Source sentences:
text: Sixteen different isotopes have been reported with atomic masses from 253 to 270 (with the exceptions of 264 and 269).
text: Twelve different isotopes of bohrium have been reported with atomic masses 260–262, 264–267, 270–272, 274, and 278, one of which, bohrium-262, has a known metastable state.