The document discusses the use of radioactive materials and different types of radiation. It provides information on alpha, beta, and gamma radiation. It asks the reader to explain how the nucleus changes during alpha, beta, and gamma emission and to describe the key properties of each type of radiation. Examples of radioactive decay involving uranium and thorium isotopes are also included.

1. 3.7 Using radioactive materials October 16, 2010 Here is some data from last lesson on popping popcorn. From this table, how long does it take for popcorn to pop? 22 9 3 52 5 2 24 34 1 2nd Attempt 1st Attempt Group Time taken to pop / s

3. α β γ The mass number: The atomic number:

4. What is radiation? Video γ β α

6. Alpha ( α ) Particles Add a number to one or more boxes to accurately describe an alpha particle

7. Beta ( β ) particles Add a number to one or more boxes to accurately describe a beta particle

8. Gamma ( γ ) rays

9. Alpha particles

10. Beta particles

11. Gamma ray