Question

All radioactive sources have a half-life. which statement about the half-life of a source is correct?
A.It is half the time for the radioactive source to become safe
B.It is half the time it takes for an atom to decay
C.It is half the time it takes the activity of the source to decrease to zero
D.It is the time it takes the activity of the source to decrease by half

Answer 1

Answer:

The correct option is (c)

It is half the time it takes the activity of the source to decrease by half.