Question detail
Which of the following describes the process of radioactive decay?
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. The emission of light from a nucleus
- B. The emission of radiation from an unstable nucleus
- C. The absorption of energy by a nucleus
- D. The splitting of an atom into smaller parts
Answer
The correct answer is B: The emission of radiation from an unstable nucleus.
Explanation
The correct answer is B: The emission of radiation from an unstable nucleus. This supports the learning objective "State that activity is measured in becquerels." in Radioactive decay and nuclear radiation 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 decay and nuclear radiation idea: The emission of light from a nucleus; The absorption of energy by a nucleus; The splitting of an atom into smaller parts.
Common mistake
Misunderstanding Activity Measurement
Students often confuse the unit of activity, becquerels, with other units of measurement, leading to incorrect answers.
Remember that activity is specifically measured in becquerels (Bq), where 1 Bq equals one decay per second. Always check that you are using the correct unit when discussing radioactive activity.
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