Short answerEasy2 marks
Complete the following nuclear changes:
Topic: Alpha and beta decay
Question wording verified against source paper
Answer
Solution diagram
Exam answer
²³⁸₉₂P → ²³⁴₉₀Q + ⁴₂He; ²³⁴₉₀Q → ²³⁴₉₁R + ⁰₋₁e.
Explanation
Alpha decay reduces A by 4 and Z by 2; beta-minus decay keeps A unchanged and raises Z by 1.
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