Assertion: natural hafnium | /r/MadeOf | one long-lived radioisotope
Facets:
value: very
type: DEGREE
Source sentences:
text: Natural hafnium ( 72 Hf) consists of five stable isotopes (176Hf, 177Hf, 178Hf, 179Hf, and 180Hf) and one very long-lived radioisotope, 174Hf, with a half-life of 2×1015 years.
text: Natural hafnium ( 72 Hf) consists of five stable isotopes (176Hf, 177Hf, 178Hf, 179Hf, and 180Hf) and one very long-lived radioisotope, 174Hf, with a half-life of 2×1015 years.