In which of the following is the electrical conductivity incorrectly explained by the description of its bonding and structure?
In liquid lithium, mobile valence electrons moving through a metallic lattice are responsible for electrical conduction.
In an aqueous solution of copper(II) sulfate, the movement of hydrated copper(II) ions and sulfate ions is responsible for electrical conduction.
In solid silicon dioxide, delocalized valence electrons within the giant covalent macromolecular network are responsible for electrical conduction.
In molten potassium iodide, mobile potassium ions and iodide ions are responsible for electrical conduction.
