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- 1. Multiple Choice
Which particles are contained in the nucleus?
Protons + Photons
Protons + Neutrons
Neutrons + Zutrons
Electrons + Protons
- 2. Multiple Choice
How many protons are in this atom?
0
6
12
18
- 3. Multiple Choice
Atoms with the same number of protons, but different numbers of neutrons, are called...
Isotopes
Ions
Atoms
Nucleons
- 4. Multiple Choice
What type of decay is shown here?
Alpha
Beta
Gamma
Photon
- 5. Multiple Choice
What is the missing number?
90
92
94
96
- 6. Multiple Choice
What are the missing two numbers?
238
92
238
90
234
92
234
90
- 7. Multiple Choice
A radioactive source has an activity of 120, and a half-life of 2 years. What will its activity be in 6 years?
0
15
30
60
- 8. Multiple Choice
A source has an activity of 200. Over a period of 8 days, it drops to an activity of 50. What is its half-life?
8 days
6 days
4 days
2 days
- 9. Multiple Choice
What is the half-life of the isotope in this graph?
140 days
200 days
380 days
400 days
- 10. Multiple Choice
A source with half-life of 10 minutes has a count rate of 240 Bq. What will the count rate be after 40 minutes?
15
30
60
120
- 11. Multiple Choice
Background radiation was measured in a lab, three times: 12 Bq, 8 Bq, 10 Bq. What is the average background radiation?
0 Bq
8 Bq
10 Bq
12 Bq
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