S1.3.1 & S1.3.2 – Emission Spectra
📌 Emission spectra
- Emission spectra are produced when atoms are excited
- Electrons move to higher energy levels
- Electrons return to lower energy levels
📌 Energy release
- Energy is released as electromagnetic radiation
- Only specific wavelengths are emitted
- This produces a line spectrum
📌 Evidence for energy levels
- Each element has a unique emission spectrum
- Energy levels are quantised
- Electrons cannot exist between energy levels
📌 Energy and frequency
- Higher energy transitions give higher frequency radiation
- Energy is proportional to frequency
- E = hf