A researcher has three unlabelled solid samples, A, B and C. The samples are diamond, graphite and buckminsterfullerene, one of each.
The researcher applies the same force with an identical pointed tool to each sample and measures the depth of the indentation. The researcher then applies the same potential difference across samples of identical dimensions.
| Sample | Depth of indentation / μm\mu\text{m}μm | Current / A |
|---|---|---|
| A | 2.0 | 0.000 |
| B | 720 | 0.360 |
| C | 390 | 0.000 |
Suggest which sample is diamond.
Explain how the results support your answer. Refer to the structure and bonding in diamond.
68 exam-style questions on AQA GCSE Chemistry 2.3 Structure and bonding of carbon, covering 2.3.1 Diamond, 2.3.2 Graphite, and 2.3.3 Graphene and fullerenes. Each one has a worked solution and a mark scheme showing where the marks go.