The metals aluminium and copper can be used to make overhead electricity power cables.
Properties of Aluminium and Copper
| Property | Aluminium | Copper |
|---|---|---|
| Electrical conductivity (arbitrary units) | 383838 | 606060 |
| Density (g/cm3\text{g/cm}^3g/cm3) | 2.72.72.7 | 8.98.98.9 |
| Relative cost per tonne (£££) | 1,9001,9001,900 | 7,6007,6007,600 |
The higher the value for electrical conductivity, the better the metal conducts electricity.
Evaluate the use of aluminium and copper for making overhead electricity power cables. Use information from the table.
2 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1 The three states of matter, 2.2.2 State symbols, 2.2.3 Properties of ionic compounds, 2.2.4 Properties of small molecules, 2.2.5 Polymers, 2.2.6 Giant covalent structures, 2.2.7 Properties of metals and alloys, and 2.2.8 Metals as conductors. Each one has a worked solution and a mark scheme showing where the marks go.