Graphite is a giant covalent substance made only of carbon atoms. A piece of graphite is connected in a complete circuit.
Which statement explains why graphite conducts electricity?
The weak forces between the layers let charge pass from layer to layer
Positive carbon ions move through the structure and carry charge
Delocalised electrons move through the structure and carry charge
The layers of carbon atoms slide over one another and carry charge
84 exam-style questions on AQA GCSE Chemistry 2.2 How bonding and structure are related to the properties of substances, covering 2.2.1a The three states of matter, 2.2.1b Limitations of the simple particle model, 2.2.2 State symbols in chemical equations, 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.