Assertion: lr's isotope | /r/HasProperty | synthesized
Facets:
value: with being the longest-lived
type: OTHER
value: so far
type: OTHER
Source sentences:
text: Twelve isotopes have so far been synthesized
text: The first isotope to be synthesized was 258Lr in 1961.
text: Thirteen isotopes of lawrencium plus one isomer have been synthesized with 266Lr being the longest-lived and the heaviest, with a half-life of 11 hours.