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Metals are found to the left of the stepped line in the periodic table. Metals have 1, 2 or 3 electrons in their outer shell. Metals have a giant metallic lattice structure as they consist of positive metal ions held in a fixed position with a sea of delocalised electrons that move randomly throughout the metal. These delocalised electrons have temporarily left the outer shell where they move throughout the metal. Metals can conduct electricity because they have delocalised electrons which are free to move throughout the metal. Electrons normally move randomly in all directions, however if a potential difference is applied the electrons will flow from the positive terminal to the negative terminal in one direction, transferring energy. An electric current is created which is the flow of electrons per second.
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