Physics 9702 · 23 Nuclear physics
23.2 Radioactive decay
Describe the random nature of radioactive decay, define half-life, and perform exponential calculations.
- Questions
- 48
- Years
- 2015–2026
- Multiple choice
- 4
- Written answer
- 44
- Average marks
- 8.3
Where this subtopic appears
- Paper 4variants 41, 42, 4344
- Paper 1variants 11, 12, 134
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 1 | – | – | 1 |
| 2025 | 1 | – | – | 1 |
| 2023 | 1 | 2 | 1 | 4 |
| 2022 | 1 | 2 | 2 | 5 |
| 2021 | 1 | 1 | 3 | 5 |
| 2020 | 1 | 2 | 2 | 5 |
| 2019 | – | 3 | 1 | 4 |
| 2018 | 1 | 3 | 2 | 6 |
| 2017 | – | 1 | 3 | 4 |
| 2016 | 1 | 2 | 2 | 5 |
| 2015 | – | 3 | 5 | 8 |
