Assertion: protactinium's life | /r/HasProperty | the time
Facets:
Source sentences:
text: The half life of a radioactive element is the time it takes for half of a sample of the element to break down.
text: One half-life is the time required for one half of any given quantity of the substance to decay.
text: One half-life is the time required for one half of any given quantity of the substance to decay.
text: Half-life is the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve.
text: The half life of a radioactive element is the time it takes for half of a sample of the element to break down.
text: half-life: the time in which there is a 50% chance that a nucleus will decay