Assertion: neptunium's life | /r/HasProperty | 24,000 years
Facets:
Source sentences:
text: For example the half life - a measure of the rate of natural decay of radioactive materials - of the waste product Plutonium 239 is 24,000 years, and that of Neptunium 237 is two million years.
text: For example the half life -- a measure of the rate of natural decay of radioactive materials -- of the waste product Plutonium 239 is 24,000 years, and that of Neptunium 237 is two million years.