Name: ___________________________________________________ Period: ___ Date: ____________________
Radioactivity Test Practice
1. What happens in radioactive decay?
2. How does a nuclear reaction differ from a chemical reaction?
3. Complete the table below about the three main types of radiation.
Type of Radiation
|
Symbol
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Mass #
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Atomic #
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What Occurs?
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What Stops it?
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ALPHA
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|
|
|
|
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BETA
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|
|
|
|
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GAMMA
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|
|
|
|
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Name the type of emission in each nuclear change. (ALPHA, BETA, or GAMMA)
4. Uranium-234 To Thorium-230
5. Thorium-230 to Radium-226
6. Radium-226 to Radon-222
7. Radon-222 to Polonium-218
8. Polonium-218 to Lead-214
9. Lead-214 to Bismuth-214
10. Bismuth-214 to Polonium-214
DEFINE:
11. Radioisotope –
12. Parent isotope –
13. Daughter isotope –
14. Fission –
15. Fusion –
Use your periodic table to determine the daughter element formed after each type of radiation is emitted from the parent isotope. You may write a nuclear decay equation if you wish.
Alpha Decay:
1. Polonium-218
2. Polonium-214
3. Polonium-210
4. Radium-224
5. Radium-220
Beta Decay:
6. Lead-210
7. Lead-214
8. Bismuth-210
9. Bismuth-212
10. Bismuth-214
Radioactive Decay of Cs-137
Half-Life
Use the graph to the right to answer the following:
11. How long is the half-life of Cesium-137?
12. If 200 grams of Cs-137 had been decaying for
90 years, how much Cs-137 would be left?
13. After 4 half-lives of decay, how much of a 1000 gram
sample of Cs-137 would be left?
14. How much time passes after 4 half-lives of decay
of Cs-137?
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