Question detail

What is the main reason why alpha-emitting contamination inside the body is particularly dangerous?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Atoms and nuclear radiation

Question

A. Alpha particles have high penetration power.
B. Alpha particles are strongly ionising.
C. Alpha particles can be easily detected.
D. Alpha particles do not cause any harm.

Answer

The correct answer is B: Alpha particles are strongly ionising..

Explanation

The correct answer is B: Alpha particles are strongly ionising.. This supports the learning objective "Evaluate radiation risk using radiation type, source location, activity and half-life." 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: Alpha particles have high penetration power.; Alpha particles can be easily detected.; Alpha particles do not cause any harm..

Common mistake

Misunderstanding Radiation Risk Evaluation

Students often confuse the factors affecting radiation risk, such as mixing up the effects of radiation type with source location.

To fix this, students should clearly differentiate between the type of radiation (alpha, beta, gamma) and how the location of the source (inside or outside the body) impacts risk assessment.

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