Exam-style question
Try this first
URANIUM SERIES case: alpha step sequence produces evidence from mass-number change. Which option best answers the objective "Explain nuclear stability using neutron-proton ratio." for Nuclear instability, while reaching the conclusion about daughter nucleus?.
- A.nuc-121-uranium-series: Link alpha step sequence to mass-number change and conclude daughter nucleus for Nuclear instability.
- B.nuc-121-uranium-series: Ignore mass-number change and answer with an unrelated Radioactivity recall phrase.
- C.nuc-121-uranium-series: Swap the required nuclear distinction and claim daughter nucleus without evidence.
- D.nuc-121-uranium-series: Use a calculation label only, without applying explain nuclear stability using neutron-proton ratio..
Model answer
What a good answer should say
- The correct option is nuc-121-uranium-series: Link alpha step sequence to mass-number change and conclude daughter nucleus for Nuclear instability.
Explanation
Why this works
It is correct because the uranium series context uses mass-number change to support explain nuclear stability using neutron-proton ratio. in Nuclear instability.
The distractors fail because they either ignore the evidence, swap a nuclear concept boundary, or give a label without the required A-Level Physics reasoning.
Common mistake
No common mistake is linked to this question yet.