Exam-style question
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In a background radiation audit, which option best applies the AQA A-Level Physics objective to calculate mass defect from nuclear masses. while keeping isotope notation, radiation type, activity and safety reasoning distinct?.
- A.nuclear-case-17: Apply Calculate mass defect from nuclear masses. in Mass and energy.
- B.nuclear-case-17: Mix Mass and energy with a different nuclear model and ignore the measured quantity.
- C.nuclear-case-17: Use a generic radiation phrase without isotope, activity or count-rate reasoning.
- D.nuclear-case-17: Treat Radioactivity as simple recall and omit the A-Level Physics distinction.
Model answer
What a good answer should say
- The correct option is nuclear-case-17: Apply Calculate mass defect from nuclear masses.
- in Mass and energy.
Explanation
Why this works
It is correct because it directly supports the approved objective: Calculate mass defect from nuclear masses. The other options are weaker because they confuse radiation type, isotope structure, count-rate interpretation, half-life reasoning, shielding, contamination or irradiation with a nearby but different nuclear physics idea.
Common mistake
No common mistake is linked to this question yet.