Question detail
Which type of radiation is the least ionising? Use the mass number context to keep Radioactive decay and nuclear radiation distinct from nearby atomic and nuclear radiation ideas.
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. Alpha radiation (radioactive decay and nuclear radiation)
- B. Beta radiation (radioactive decay and nuclear radiation)
- C. Gamma radiation (radioactive decay and nuclear radiation)
- D. Neutron radiation (radioactive decay and nuclear radiation)
Answer
The correct answer is Gamma radiation (radioactive decay and nuclear radiation).
Explanation
The correct answer is Gamma radiation (radioactive decay and nuclear radiation). It directly supports the learning objective: Compare alpha, beta and gamma radiation in terms of ionising power.. In Radioactive decay and nuclear radiation, this is the best option because it matches the specific mass number context; the other options mix up nearby ideas such as activity, count rate, isotope notation, radiation type, or nuclear-equation changes.
Common mistake
Ionising Power Confusion
Students often confuse the ionising power of alpha, beta, and gamma radiation, thinking they are similar.
Remember that alpha radiation is strongly ionising, beta radiation is moderately ionising, and gamma radiation is weakly ionising. Use a table to compare their properties.
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