In a sample of helium gas, an electron in one helium atom moves from an allowed orbit nearer the nucleus to an allowed orbit farther from the nucleus.
Which describes the energy transfer for this change?
The atom absorbs radiation, and energy is transferred to the electron.
The atom absorbs radiation, and energy is transferred from the electron.
The atom emits radiation, and energy is transferred from the electron.
The atom emits radiation, and energy is transferred to the electron.
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.