A sample of a metal salt is heated in a flame. Energy transferred by heating causes some electrons in the metal atoms to occupy allowed orbits farther from their nuclei. The electrons remain in the atoms. A sensor detects visible radiation from the flame.
Explain the atomic changes that produce the radiation detected by the sensor.
103 exam-style questions on Edexcel GCSE Physics 6.1 Atomic structure and isotopes, covering 6.1.1 Structure of the atom, 6.1.2 Isotopes: atomic and mass number, 6.1.3 Sub-atomic particles: masses and charges, and 6.1.4 Electron orbits and energy changes. Each one has a worked solution and a mark scheme showing where the marks go.