14,988+ Questions · 21 Subjects · Free to Practice

Regarding radioactive decay, consider: (I) radioactive elements decay exponentia

1. Regarding radioactive decay, consider: (I) radioactive elements decay exponentially over time, (II) half-life is the time needed for half the radioactive atoms in a sample to decay, and (III) radioactive dating can help determine the age of the Earth. Which are correct?

 

Statements I, II, and III are all correct. A common misconception, though, is that half-life exactly equals half the mean life — it’s actually about 69.3 percent of the mean life, not exactly 50 percent.

Beyond the answer

    Leave a Reply

    Discover more from MCQ Questions

    Subscribe now to keep reading and get access to the full archive.

    Continue reading