A school builds a scale model of an atom on its playing field. A bead of diameter 1.2 mm represents the nucleus. The same scale is used for every length in the model.
The actual radius of the atom is 1.0 × 10-10 m and the actual radius of its nucleus is 2.0 × 10-15 m.
What is the diameter of the atom in the model?
60 m60\ \mathrm{m}60 m
30 m30\ \mathrm{m}30 m
6.0 m6.0\ \mathrm{m}6.0 m
120 m120\ \mathrm{m}120 m
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.