Question 1
Question detail
Why can a contaminated object 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. Because it is exposed to ionising radiation
- B. Because the radioactive atoms are unstable and decay over time
- C. Because it absorbs radiation from the environment
- D. Because it is shielded from external radiation sources
Answer
Because the radioactive atoms are unstable and decay over time
Explanation
A contaminated object emits radiation because the radioactive atoms present are unstable and will continue to decay, emitting radiation as they do so.
Common mistake
Contaminated Object Emission
Students often think that a contaminated object stops emitting radiation once it is removed from the radioactive source.
Emphasize that a contaminated object continues to emit radiation because it contains radioactive atoms, regardless of its location.
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