# Topic Questions: 11 represent $\alpha$- and $\beta$-decay by a radioactive decay equation of the form $^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}\alpha$ — 9702 P1 Atoms, nuclei and radiation

> 10 9702 P1 Atoms, nuclei and radiation topic questions (10 marks) on 11 represent …- and …-decay by a radioactive… — 10 papers, 2025–2026. Open the exact…

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CIE IAL · Physics · 9702 P1 · Atoms, nuclei and radiation

10 9702 P1 Atoms, nuclei and radiation topic questions are tagged to this syllabus point across 10 papers (2025–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.

- 10 topic questions
- 10 papers
- 10 tagged marks
- 37.0% of topic questions
- 37.0% of topic marks
- 2025–2026
- Syllabus 2025–2027
- [All 9702 P1 Atoms, nuclei and radiation topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**This Atoms, nuclei and radiation syllabus point appears in 10 9702 P1 papers across 2025–2026, contributing 10 topic questions and 10 marks.** The most recent appearance is 9702/11 May/June 2026. That equals 37.0% of the 27 topic questions and 37.0% of the 27 marks tagged to Atoms, nuclei and radiation. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history.

## Topic questions by session

Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub.

| Paper | Question | Type | Parts | Marks | Difficulty | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| [**9702/11** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2026-may-june-9702-11/#q-39) | **Q39** Nuclide Product of Carbon-10 Positron Emission - CIE Physics 2026 Jun Paper 11 Q39 | FRQ | 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=cc3bc1fb-5d32-4ebd-a007-75eca5050e6a&question_id=ddd938db-733f-483c-9a04-b51f545b95cc&source_detail=9702%2F11+May%2FJune+2026) |
| [**9702/12** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2026-may-june-9702-12/#q-40) | **Q40** Radioactive Decay Sequence Forming an Isotope - CIE Physics 2026 Jun Paper 12 Q40 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=dff8c5d1-5de5-49c0-b417-97a49ecae26e&question_id=171938d7-2e76-4143-bdd8-56ac1edbd72e&source_detail=9702%2F12+May%2FJune+2026) |
| [**9702/13** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2026-may-june-9702-13/#q-40) | **Q40** Alpha Decay on Neutron-Proton Graph - CIE Physics 2026 Jun Paper 13 Q40 | FRQ | 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b1c6e9e0-2b9a-46bc-95ba-9424df870b39&question_id=3ecadc27-410e-45e1-8f85-e9e60d3c7994&source_detail=9702%2F13+May%2FJune+2026) |
| [**9702/14** May/June 2026 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2026-may-june-9702-14/#q-39) | **Q39** Quark Conversion in Radioactive Decay - CIE AS Physics 2026 Jun Paper 14 Q39 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=de063b94-8315-433b-9015-36c4298fd0da&question_id=8cf6fe6c-7fa5-4f2c-b838-a2fd58edc37e&source_detail=9702%2F14+May%2FJune+2026) |
| [**9702/11** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-october-november-9702-11/#q-38) | **Q38** Alpha and Beta Decay Sequence - CIE Physics 2025 Nov Paper 11 Q38 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=924eca36-7f76-4bd9-bfca-c73eef3ca841&question_id=08202b03-bae5-4df8-9ecc-b828c41c7b63&source_detail=9702%2F11+October%2FNovember+2025) |
| [**9702/12** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-october-november-9702-12/#q-40) | **Q40** Uranium Decay Chain Alpha and Beta Emissions - CIE AS Physics 2025 Nov Paper 12 Q40 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a9354265-4ad0-4b45-86d5-ea844b7fc508&question_id=f9b3b7c1-ffcd-44fe-bc94-25a24d0c4e03&source_detail=9702%2F12+October%2FNovember+2025) |
| [**9702/13** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-october-november-9702-13/#q-38) | **Q38** Radioactive Decay Chain Identification - CIE AS Physics 2025 Winter Paper 13 Q38 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e008d23b-4651-402b-b889-f33aa055a6e8&question_id=3cb18d0e-7ecd-490a-a044-07e00ea96384&source_detail=9702%2F13+October%2FNovember+2025) |
| [**9702/14** October/November 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-october-november-9702-14/#q-39) | **Q39** Neutron Number in Decay Chain Product - CIE Physics 2025 Nov Paper 14 Q39 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8d338983-d025-4544-9fad-eeb58b6137e4&question_id=6ef05573-b48d-4289-b8aa-ca12eb92ff32&source_detail=9702%2F14+October%2FNovember+2025) |
| [**9702/13** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-may-june-9702-13/#q-40) | **Q40** Isotope Formation via Sequential Alpha and Beta Decays - CIE Physics 2025 Jun Paper 13 Q40 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8b189094-c406-4e28-b27f-08421d7e7345&question_id=d522f6d9-839a-4d47-8ecb-4fd87f183aaf&source_detail=9702%2F13+May%2FJune+2025) |
| [**9702/14** May/June 2025 · CIE IAL](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2025-may-june-9702-14/#q-38) | **Q38** Successive Radioactive Decays of a Nucleus - CIE Physics 2025 Jun Paper 14 Q38 | FRQ | 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2106ff7e-11fe-46fe-a4ec-d7c6bb2b24c8&question_id=2485e5d9-5b37-404f-803e-5e5b1f7ac424&source_detail=9702%2F14+May%2FJune+2025) |

## Related topic questions in Atoms, nuclei and radiation

- [1 infer from the results of the $\alpha$-particle scattering experiment the existence and small size of the nucleus](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/1-infer-from-the-results-of-the-alpha-particle-scattering-experiment-the-existence/) — 1 question items · 1 papers — 1 marks · 2026
- [2 describe a simple model for the nuclear atom to include protons, neutrons and orbital electrons](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/2-describe-a-simple-model-for-the-nuclear-atom-to-include-protons-neutrons-and/) — 3 question items · 3 papers — 3 marks · 2025–2026
- [3 distinguish between nucleon number and proton number](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/3-distinguish-between-nucleon-number-and-proton-number/) — 4 question items · 4 papers — 4 marks · 2025
- [4 understand that isotopes are forms of the same element with different numbers of neutrons in their nuclei](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/4-understand-that-isotopes-are-forms-of-the-same-element-with-different-numbers-of/) — 4 question items · 4 papers — 4 marks · 2025–2026
- [5 understand and use the notation $^{A}_{Z}X$ for the representation of nuclides](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/5-understand-and-use-the-notation-a-z-x-for-the-representation-of-nuclides/) — 3 question items · 3 papers — 3 marks · 2025
- [6 understand that nucleon number and charge are conserved in nuclear processes](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/6-understand-that-nucleon-number-and-charge-are-conserved-in-nuclear-processes/) — 8 question items · 8 papers — 8 marks · 2025–2026

## Topic question rules and edge cases

**How many topic questions cover this syllabus point?**

10 question stems cover this subtopic across 10 papers, but only 10 tagged parts and 10 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page.

**Which papers include this subtopic?**

The table lists every matching session from 2025–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available.

**Why can one question appear under several subtopics?**

The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement.

**Can I practise these questions with AI marking?**

Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript.

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