How do ionic compounds conduct electricity?
Ionic compounds are made from Metallic elements bonded to Nonmetallic elements. Metals give up electrons and therefore become positive charged ions (cations). Non metals take electrons and therefore become negative charged ions (anions). In an aqueous solution, the ionic compound dissociates (comes apart) into it's ions. These ions move to the cathode and anode of the conductivity tester or through the conductive material thereby causing electricity to flow. What you then see is a light lit or some other indication that electricity is flowing.