Physics 9702 · 22 Quantum physics
22.4 Energy levels in atoms and line spectra
Explain discrete atomic energy levels, line spectra formation, and calculate transition photon frequencies.
- Questions
- 19
- Years
- 2016–2026
- Multiple choice
- 0
- Written answer
- 19
- Average marks
- 8.5
Where this subtopic appears
- Paper 4variants 41, 42, 4319
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 1 | – | – | 1 |
| 2025 | 1 | – | 1 | 2 |
| 2023 | 1 | 1 | – | 2 |
| 2022 | – | – | 1 | 1 |
| 2020 | – | 2 | 1 | 3 |
| 2018 | – | – | 1 | 1 |
| 2017 | 1 | 2 | – | 3 |
| 2016 | – | 5 | 1 | 6 |
