A silicon track in a sensor is designed so that 1.5 × 104 silicon atoms would span its width in a straight line. The diameter of a silicon atom is 2.8 × 10-10 m.
Estimate the width of the track.
1.9×10−14 m1.9\times10^{-14}\,\mathrm{m}1.9×10−14m
4.2×10−14 m4.2\times10^{-14}\,\mathrm{m}4.2×10−14m
4.2×10−5 m4.2\times10^{-5}\,\mathrm{m}4.2×10−5m
4.2×10−6 m4.2\times10^{-6}\,\mathrm{m}4.2×10−6m
101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.