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Electrolysis: Breaking down of substance by electricity
Circuits: a path or line through which an electrical current flows. It is made by a sorce of electrycity (Battery), wires  and the electrodes joined  all together

electrode acheted to positive terminal of the battery is also positive is called anode

The negative electrode is called cathode.

electrons carry the current thought the wirred of  and electrons.But inos carry it through a liquid.

graphite electrodes are inert .

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Conductors: a substance that allows heat or electricity to pass through it easily.
Insulator: a poor conductor of heat or electricity(not allows their flow)

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Electrolysis breaks the molten ionic compound down to its elements,giving the metal at the cathode,and the non metal to the anode.

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Electrolysis can also be carried out on solutions of ionic compounds in water,because ions are free to move.
At the cathode, if the Metal in the solution is more reactive thant hydrogen, this last element will be given and it will bubble off.
At the anode, the substance that is more likely to gve elctrons will bubble off