Liquid bromine consists of small molecules and does not conduct electricity. Which statement explains why liquid bromine does not conduct electricity?
The molecules are held together by strong covalent bonds
The molecules contain electrons that are not free to move
The molecules are too large to move past one another easily
The molecules do not have an overall electric charge
42 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.