Name ______Date ______Per______ST#______

RADIOACTIVITY REVIEW:

Listen to this song, just for fun: http://www.youtube.com/watch?v=zUDDiWtFtEM&safe=active

Stable isotopes: http://www.periodictable.com/Properties/A/StableIsotopes.html

Known Isotopes: http://periodictable.com/Properties/A/KnownIsotopes.html

Define or answer the following questions:

0. Draw an atom

1. Explain alpha radiation

2. Explain beta radiation

3. Explain gamma radiation

4. What are the masses of protons, neutrons, and electrons?

5. Write the nuclear notation for the 3 forms of hydrogen we talked about, with the name of each form.

6. Provide an explanation and the nuclear notation for how carbon 14 becomes nitrogen 14.

Answer the following questions while looking at page 29 of packet:

7. Explain roughly how much U-238 there will be on the planet today if there was just one pound when the earth was made (not true, by the way).

8. When a helium nucleus is released, where does it eventually pick up 2 electrons to become helium on the periodic table?

9. What happens to the atomic number of an element when it releases an alpha particle?

10. What happens to the atomic mass of an atom when it releases an alpha particle?

11. What happens to the atomic number of an element when it releases a beta particle?

12. What happens to the atomic mass of an atom when it releases a beta particle?

13. Explain how you can get from U-238 to U-234 in the first 3 steps on the chart on page 29. You have to use the nuclear notation for each element in each step for your explanation!

14. How long will it take for roughly half of a sample of U-238 to turn into Th-234?

15. How long will it take for part of a sample of Th-234 to turn into Pb-206 (lead 206), which is stable (not radioactive)? Assume that it has to go through all of the half-lives listed. Can you explain what the issue is with this question?

16. Why isn’t there any info about gamma radiation on pages 29-30?

17. Polonium-214 turns into lead 210 in 1 microsecond. How long is a microsecond?

18. What trick(s) are you going to use to remember the info about alpha, beta and gamma radiation?

19. Look on page 33 of your packet. Explain why the chart is designed the way it is designed!