If three samples have the half-lives listed below,which sample would remain radioactive the longest?
A)a sample with a half-life of 20 minutes
B)a sample with a half-life of 20 hours
C)a sample with a half-life of 20 years
D)a sample with a half-life of 20 million years
E)none of the above

Question

Quizplus · Accepted Answer

A sample with a half-life of 20 million years would remain radioactive the longest because its rate of decay is the slowest among the options provided.

If Three Samples Have the Half-Lives Listed Below,which Sample Would