Assertion: decay's life | /r/HasProperty | the period
Facets:
Source sentences:
text: Considering that Plutonium 239 has a half-life (the period in which 50 percent of nuclides will have undergone nuclear decay ) of 24,110 years, nuclear aftermaths indeed seem to defy a human conception of time.
text: Half-life is the time period that is characterized by the time it takes for half of the substance to decay (both radioactive and non-radioactive elements).The rate of decay remains constant throughout the decay process.