C4g - Metal Structure and Properties 4.0 / 5 based on 2 ratings ? ChemistryStructure and bondingGCSEOCR Created by: EsmeCreated on: 21-11-12 18:42 What can iron be used for? Why? Making steel, it's strong. 1 of 11 What can copper be used for? Why? Making electrical wiring, it's a good conductor. 2 of 11 What properties do metals have? Lustrous, hard, dense, tensile, high melting/boiling points, good conductors of heat/electricity. 3 of 11 How are metal atoms packed? Very close together in a regular arrangement. 4 of 11 How are metal atoms held together? By metallic bonds. 5 of 11 What can the structure of metal atoms be described as? A structure of crystals? 6 of 11 Describe metal crystals? Closely packed positive metal ions in a 'sea' of delocalised electrons. 7 of 11 Describe metallic bonds? Electrostatic attractions between the metal ions and the delocalised electrons. 8 of 11 What is a superconductor? A metal that has little or no resistance to the flow of electricity. 9 of 11 What are superconductors useful for? Powerful electromagnets, fast electronic circuits, power transmissions. 10 of 11 What is the disadvantage of current superconductors? They only work at belowe -200 they're costly and impractical. 11 of 11
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