An electron in an atom changes from orbit P to orbit Q. The energies of the two allowed orbits are shown in the table.
| Orbit | Energy (J) |
|---|---|
| P | 7.2 × 10-19 |
| Q | 2.7 × 10-19 |
Calculate the energy transferred in the change from orbit P to orbit Q.
Explain whether the atom emits or absorbs radiation during this change.
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.