1. Describe the importance of the neutron in atomic nuclei. 2. Describe ray in your own...

1. Describe the importance of the neutron in atomic nuclei.

2. Describe α ray in your own words.

3. Describe a γ ray in your own words.

4. Describe a β ray in your own words.

5. What important discovery was made by Enrico Fermi?

6. Explain a self-sustaining chain reaction.

7. Describe nuclear fusion.

8. Describe nuclear fission.

9. What fraction of a radioactive sample has not decayed after four half-lives have elapsed?