Question detail
Which type of radiation is considered the most ionising but least penetrating? Use the beta source context to keep Radioactive contamination 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 contamination 20)
- B. Beta radiation (radioactive contamination 20)
- C. Gamma radiation (radioactive contamination 20)
- D. Neutron radiation (radioactive contamination 20)
Answer
The correct answer is Alpha radiation (radioactive contamination 20).
Explanation
The correct answer is Alpha radiation (radioactive contamination 20). It directly supports the learning objective: Compare the hazards of alpha, beta and gamma radiation inside the body.. In Radioactive contamination, this is the best option because it matches the specific beta source context; the other options mix up nearby ideas such as activity, count rate, isotope notation, radiation type, or nuclear-equation changes.
Common mistake
Misunderstanding Radiation Hazards
Students often confuse the hazards of alpha, beta, and gamma radiation when considering their effects inside the body, thinking all types pose the same level of risk.
To fix this, students should study the properties of each type of radiation, focusing on their ionising power and penetration abilities, and understand that alpha particles are more harmful when ingested due to their strong ionising capability.
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