Question detail
What is the primary reason why a contaminated object can continue to emit radiation?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and nuclear radiation
Question
- A. It has absorbed radiation from the environment
- B. It contains radioactive atoms that are unstable
- C. It has been exposed to high temperatures
- D. It is made of a radioactive material
Answer
The correct answer is B: It contains radioactive atoms that are unstable.
Explanation
The correct answer is B: It contains radioactive atoms that are unstable. This supports the learning objective "Define irradiation as exposure to ionising radiation from a radioactive source." in Radioactive contamination because it uses the correct atomic and nuclear radiation relationship for Atoms and nuclear radiation. The other options are less suitable because they do not match the required Radioactive contamination idea: It has absorbed radiation from the environment; It has been exposed to high temperatures; It is made of a radioactive material.
Common mistake
Confusing Irradiation with Contamination
Students often confuse irradiation with contamination, thinking that exposure to radiation makes an object radioactive.
Clarify that irradiation refers to exposure to radiation, while contamination involves the presence of radioactive materials on or inside an object.
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