Chemistry 9701 · 1 Atomic structure
1.2 Isotopes
Define isotopes, use isotopic notation, and explain why isotopes share chemical properties but differ in physical properties like mass and density.
- Questions
- 64
- Years
- 2015–2026
- Multiple choice
- 41
- Written answer
- 23
- Average marks
- 5
Practise atomic structure questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 1341
- Paper 2variants 21, 22, 23, 2420
- Paper 4variants 41, 433
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 2 | – | 2 |
| 2024 | – | – | 1 | 1 |
| 2023 | 1 | 3 | 2 | 6 |
| 2022 | – | 3 | 1 | 4 |
| 2021 | 2 | 1 | 3 | 6 |
| 2020 | 1 | 4 | 4 | 9 |
| 2019 | – | 7 | 3 | 10 |
| 2018 | – | 1 | 2 | 3 |
| 2017 | 1 | 3 | 2 | 6 |
| 2016 | 1 | 3 | 4 | 8 |
| 2015 | – | 9 | – | 9 |
