Assertion: neptunium's life | /r/HasProperty | long
Facets:
value: like that of 231pa
type: OTHER
value: very
type: DEGREE
Source sentences:
text: Nishina and Kimura thus correctly speculated that the half-life of 23793, like that of 231Pa, was very long and hence its activity would be so weak as to be unmeasurable by their equipment, thus concluding the last and closest unsuccessful search for transuranic elements.