The table gives data for cube-shaped particles of the same material.
| Side length of cube (nm) | Surface area to volume ratio (nm⁻¹) |
|---|---|
| 3 | 2.0 |
| 6 | 1.0 |
| 12 | 0.5 |
Calculate the surface area to volume ratio of a cube with a side length of 4 nm. Explain what the data show about the fraction of atoms at the surface as the particles become smaller.
122 exam-style questions on OCR GCSE Chemistry 2.3 Properties of materials, covering 2.3.1 Carbon bonding and the variety of organic compounds, 2.3.2 Diamond, graphite, fullerenes and graphene, 2.3.3 Bond strength, changes of state and predicting states, 2.3.4 Bulk properties and types of bonding, and 2.3.5 Nanoparticles: scale, surface area, uses and risks. Each one has a worked solution and a mark scheme showing where the marks go.