Predict that a metal forms at the cathode when a molten ionic compound is electrolysed.

During the electrolysis of molten ionic compounds, the process involves the movement of ions towards the electrodes. At the cathode, which is the negative electrode, positive metal ions gain electrons and are reduced to form solid metal. This prediction is based on the understanding that molten ionic compounds contain free-moving ions, allowing for the conduction of electricity. Therefore, when an ionic compound is electrolysed, a metal is produced at the cathode, demonstrating the principles of electrolysis and the behavior of ions in an electric field.