After one half-life,50% of a radioactive sample will remain.After the second half-life,none of the radioactivity will be left.

Question

Quizplus · Accepted Answer

After one half-life, half of the radioactive sample will remain, which means that 50% has decayed. After the second half-life, another 50% of the remaining half will decay, leaving 25% of the original amount. It takes multiple half-lives for all of the radioactivity to decay, so there will still be some left after the second half-life.

After One Half-Life,50% of a Radioactive Sample Will Remain