÷ÈÓ°Ö±²¥

By how many units does the mass number of a nucleus change when the nucleus produces an alpha particle? By how many units does the mass number of a nucleus change when the nucleus produces a beta particle? Is each change an increase or decrease in mass number?

Hundreds of years ago, alchemists tried to turn lead into gold. Is this transformation possible? If not, why not? If yes, how would you do it?

Do radiotracers generally have long or short halflives? Why?

Discuss what is meant by the term "critical mass" and explain why the ability to achieve a critical mass is essential to sustaining a nuclear reaction.

Why is it difficult to determine the effects of radiation on humans?