Chemistry 9701 · 2 Atoms, molecules and stoichiometry
2.1 Relative masses of atoms and molecules
Define unified atomic mass unit, relative atomic, isotopic, molecular, and formula masses.
- Questions
- 53
- Years
- 2015–2026
- Multiple choice
- 30
- Written answer
- 23
- Average marks
- 5.5
Practise atoms, molecules and stoichiometry questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 1330
- Paper 3variants 32, 33, 3412
- Paper 2variants 21, 22, 237
- Paper 4variants 422
- Paper 5variants 51, 522
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 1 | – | 1 |
| 2024 | – | – | 1 | 1 |
| 2023 | 3 | 2 | 3 | 8 |
| 2022 | 1 | 1 | 1 | 3 |
| 2021 | 1 | 3 | 2 | 6 |
| 2020 | – | 4 | 2 | 6 |
| 2019 | 1 | 4 | – | 5 |
| 2018 | 1 | 2 | – | 3 |
| 2017 | 2 | 5 | 1 | 8 |
| 2016 | – | 4 | 3 | 7 |
| 2015 | – | 1 | 4 | 5 |
