A microscopic particle has a diameter of 0.08 μm0.08\ \mu\mathrm{m}0.08 μm. Its diameter is approximately 400 times the diameter of one atom.
What is the estimated diameter of one atom in metres?
2.0×10−10 m2.0\times10^{-10}\ \mathrm{m}2.0×10−10 m
2.0×10−8 m2.0\times10^{-8}\ \mathrm{m}2.0×10−8 m
2.0×10−7 m2.0\times10^{-7}\ \mathrm{m}2.0×10−7 m
2.0×10−13 m2.0\times10^{-13}\ \mathrm{m}2.0×10−13 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.