Question detail
Explain why alpha radiation is considered strongly ionising but weakly penetrating.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and nuclear radiation
Question
Explain why alpha radiation is considered strongly ionising but weakly penetrating.
Answer
Alpha radiation is strongly ionising because it consists of large, positively charged particles that can easily interact with and ionise nearby atoms. However, it is weakly penetrating because its large mass and charge cause it to lose energy quickly and be stopped by just a few centimeters of air or a sheet of paper.
Explanation
This question assesses the student's ability to explain the relationship between the physical properties of alpha particles and their ionising and penetrating abilities. It encourages a deeper understanding of the nature of alpha radiation.
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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