The half- life of a radioactive isotope is
A) the time required for a nucleus of that isotope to partially decay.
B) half the time required for a nucleus of that isotope to decay.
C) half the time that it takes for a radioactive isotope to eat a large pizza.
D) the time required for the decay of half of a large sample of nuclei of that isotope.
E) half the time required for the decay of a large sample of nuclei of that isotope.

Question

Quizplus · Accepted Answer

The half-life of a radioactive isotope is the time required for half of the nuclei in a large sample to decay.

The Half- Life of a Radioactive Isotope Is