Chemistry 9701 · 2 Atoms, molecules and stoichiometry
2.3 Formulas
Write ionic formulas, construct balanced and ionic equations with state symbols, and calculate empirical and molecular formulas.
- Questions
- 208
- Years
- 2015–2026
- Multiple choice
- 105
- Written answer
- 103
- Average marks
- 7.1
Practise atoms, molecules and stoichiometry questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13, 14105
- Paper 3variants 31, 32, 33, 34, 35, 36, 3768
- Paper 5variants 51, 52, 5318
- Paper 2variants 21, 22, 2312
- Paper 4variants 41, 435
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 13 | – | 13 |
| 2025 | – | 1 | – | 1 |
| 2023 | 2 | 9 | 15 | 26 |
| 2022 | 3 | 13 | 6 | 22 |
| 2021 | 5 | 7 | 7 | 19 |
| 2020 | 2 | 5 | 5 | 12 |
| 2019 | 4 | 10 | 14 | 28 |
| 2018 | 3 | 11 | 7 | 21 |
| 2017 | 1 | 8 | 13 | 22 |
| 2016 | 1 | 14 | 11 | 26 |
| 2015 | – | 10 | 8 | 18 |
