Final answer:
Silicon dioxide does not conduct electricity because it is an insulator. The electrons and ions in silicon dioxide are bound in the structure and cannot move easily. The bonding in silicon dioxide is covalent, not ionic.
Step-by-step explanation:
Silicon dioxide does not conduct electricity because it is an insulator. Insulators are substances that do not allow charges to move through them. In silicon dioxide, electrons and ions are bound in the structure and cannot move easily. This is because the bonding in silicon dioxide is covalent and not ionic, meaning there are no free ions to carry the electric charge.