GCSE Combined Science (AQA)

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Properties of Metals

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Bonding, structure, and the properties of matter How bonding and structure are related to the properties of substances

Properties of Metals

2:04 Structure and Properties of Metals and Alloys
Spec 4.2.2.7 4.2.2.8 4.2.1.5
Previous Giant Covalent Structures Next Alloys
  • Metals consist of a lattice of positive ions and a sea of delocalized electrons.
  • Positive metal ions are arranged in an irregular lattice surrounded by negatively charged delocalized electrons.
  • Metals have high melting and boiling points due to strong metallic bonds.
  • Aluminum has a melting point of 660��C and a boiling point of 2,470��C.
  • Strong forces of attraction exist between positive metal ions and the negative sea of delocalized electrons.
  • Metallic bonds are strong and require a lot of energy to overcome.
  • Metals are good conductors of electricity because delocalized electrons can carry electrical charge.
  • Delocalized electrons within the metallic structure are free to move, allowing electric charge to flow.
  • Metals are good conductors of thermal energy.
  • In a metal radiator, heat is conducted from the bottom to the top and transferred to the surroundings.
  • Energy is transferred by delocalized electrons, which move throughout the structure, transferring heat energy.

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