Radioactive Decay Quiz
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5 questions, one answer each
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1. What is the unit of activity for a radioactive source?
- A. A. Volt
- B. B. Becquerel
- C. C. Newton
- D. D. Gray
2. Which type of nuclear radiation is stopped by a sheet of paper?
- A. A. Gamma
- B. B. Beta
- C. C. Alpha
- D. D. Neutron
3. In beta decay, what happens to the atomic number of the nucleus?
- A. A. It decreases by 2
- B. B. It stays the same
- C. C. It increases by 1
- D. D. It decreases by 4
4. A worker stands behind a lead screen while an X-ray source is used nearby, but never touches the source. This is an example of:
- A. A. contamination
- B. B. irradiation
- C. C. background radiation only
- D. D. nuclear fusion
5. A hospital uses a radioactive tracer to image a patient's kidneys. What must be weighed up before deciding to use it?
- A. A. Only the cost of the equipment
- B. B. The medical benefit against the radiation risk to the patient
- C. C. Whether the tracer is alpha or beta only
- D. D. The colour of the resulting image