Question

Which statement about the half-life of a source is correct? *
2 points
It is half the time it takes for an atom to decay
It is the time it takes the activity of the source to decrease by half
It is half the time it takes the activity of the source to decrease to zero
It is half the time for the radioactive source to become safe

Answer 1

Answer:

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