A manufacturer needs a metal for small gear teeth that must resist indentation.
The manufacturer tests two samples using the same force.
| Sample | Copper in sample (%) | Zinc in sample (%) | Depth of indentation in mm |
|---|---|---|---|
| A | 100 | 0 | 0.38 |
| B | 70 | 30 | 0.15 |
Explain which sample should be used for the gear teeth. Use the data and the arrangement of atoms in your answer.
118 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.