Exam-style question
Try this first
Which of the following particle interactions violates conservation of baryon number?.
- A.p + p → p + n + β⁺
- B.p + e⁻ → n + β⁺
- C.n + n → p + p + β⁻ + β⁺
- D.p + β⁻ → n + β⁻
Model answer
What a good answer should say
- p + p → p + n + β⁺.
- the correct option
Explanation
Why this works
The correct answer is p + p → p + n + β⁺. It is the only option that matches the AQA A-Level Physics requirement for Applications of conservation laws; the distractors either apply to a different particle concept or reverse the relationship being tested.
Common mistake
No common mistake is linked to this question yet.