When ionic compounds conduct
When ionic compounds conduct
Electricity flows only when charged particles can move. Metals conduct because they have delocalised electrons, but simple covalent substances such as sugar do not conduct because their molecules are neutral.
Step-by-step lessons on Edexcel IGCSE Chemistry Electrolysis. Each one builds up to exam-style questions. Build a solid grasp of atomic structure, bonding and the mole concept early, since these underpin almost every other topic, then move on to the more calculation-heavy quantitative and organic chemistry content.