How is the half-life of a radioactive parent isotope defined?
A)the time it takes for half of the parent isotope to decay to daughter isotope
B)half the time it takes for the parent isotope to completely decay
C)the time it takes the parent isotope to go through half the decay steps necessary to produce a stable daughter isotope
D)half of the average rate of decay of the parent isotope

Question

Quizplus · Accepted Answer

The half-life of a radioactive parent isotope is defined as the time it takes for half of the parent isotope to decay into its daughter isotope. This means that after one half-life, only half of the initial parent isotope remains, while the other half has decayed into the daughter isotope.

How Is the Half-Life of a Radioactive Parent Isotope Defined