Which of the following is not responsible for the conduction of electricity?
The delocalized valence electrons in solid aluminum
The localized covalent bonding electrons in liquid phosphorus trichloride (PCl3\text{PCl}_3PCl3)
The mobile ions in molten magnesium iodide
The delocalized electrons in solid graphite
54 exam-style questions on AQA A Level Chemistry Bonding, covering Ionic bonding, Nature of covalent and dative covalent bonds, Metallic bonding, Bonding and physical properties, Shapes of simple molecules and ions, Bond polarity, and Forces between molecules. Each one has a worked solution and a mark scheme showing where the marks go.