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The non-metal ions lose electrons to the anode (this is called oxidation) and are discharged as non-metal atoms which often combine to form molecules. In this way, elements that are present in ionic compounds can be separated by electrolysis. This method is used for the extraction of some metals from their ore.See for example lead bromide, magnesium chloride, potassium chloride, sodium chloride and zinc chloride.he non-metal ions lose electrons to the anode (this is called oxidation) and are discharged as non-metal atoms which often combine to form molecules. In this way, elements that are present in ionic compounds can be separated by electrolysis. This method is used for the extraction of some metals from their ore.
For nearly all metals a chemical reaction is used to extract the metal from its ore. Since chemical reactions are accompanied by either the release or absorption of heat, a form of energy, it can be concluded that for most metals the extraction reactions require the input of considerable amounts of energy (heat).he more common a metal is and the easier it is to extract and produce the. lower the commercial price. Aluminium is the most abundant metal, but is very. reactive and therefore requires large amounts of electricity to extract it from its. ore, Bauxite. Iron on the other hand is cheaper to extract from its ore.