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

Topic Questions: 3 distinguish between nucleon number and proton number — 9702 P1 Atoms, nuclei and radiation

4 9702 P1 Atoms, nuclei and radiation topic questions are tagged to this syllabus point across 4 papers (2025). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.

4 topic questions 4 papers 4 tagged marks 14.8% of topic questions 14.8% of topic marks 2025 Syllabus 2025–2027

All 9702 P1 Atoms, nuclei and radiation topic questions All paper codes

Core finding

This Atoms, nuclei and radiation syllabus point appears in 4 9702 P1 papers across 2025, contributing 4 topic questions and 4 marks. The most recent appearance is 9702/11 October/November 2025. That equals 14.8% of the 27 topic questions and 14.8% 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
9702/11October/November 2025 · CIE IAL	Q39 Composition of a Plutonium Ion - CIE Physics 2025 Nov Paper 11 Q39	FRQ	1 part	1	Easy	Go to Practice Hub
9702/13October/November 2025 · CIE IAL	Q39 Subatomic Particle Composition of Plutonium Ion - CIE AS Physics 2025 Winter Paper 13 Q39	FRQ	1 part	1	Easy	Go to Practice Hub
9702/14October/November 2025 · CIE IAL	Q39 Neutron Number in Decay Chain Product - CIE Physics 2025 Nov Paper 14 Q39	FRQ	1 part	1	Medium	Go to Practice Hub
9702/14May/June 2025 · CIE IAL	Q37 Subatomic Particle Count in Charged Uranium Ion - CIE Physics 2025 Jun Paper 14 Q37	FRQ	1 part	1	Medium	Go to Practice Hub

Related topic questions in Atoms, nuclei and radiation

1 infer from the results of the $α$ -particle scattering experiment the existence and small size of the nucleus 1 question items · 1 papers 1 marks · 2026 2 describe a simple model for the nuclear atom to include protons, neutrons and orbital electrons 3 question items · 3 papers 3 marks · 2025–2026 4 understand that isotopes are forms of the same element with different numbers of neutrons in their nuclei 4 question items · 4 papers 4 marks · 2025–2026 5 understand and use the notation $_{Z}^{A} X$ 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 8 question items · 8 papers 8 marks · 2025–2026 7 describe the composition, mass and charge of $α$ -, $β$ - and $γ$ -radiations (both $β^{-}$ (electrons) and $β^{+}$ (positrons) are included) 3 question items · 3 papers 3 marks · 2025–2026

Topic question rules and edge cases

How many topic questions cover this syllabus point?: 4 question stems cover this subtopic across 4 papers, but only 4 tagged parts and 4 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. 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.