Cards (7)

  • what structure are metals?
    giant structure
  • what are the electrons in the outer shell of a metal atom doing and what are the forces between them?
    -they are delocalised so free to move around
    -strong forces of electrostatic attraction between the positive metal ions and the shared negative electrons
  • how strong is metallic bonding?
    very strong
  • what are the properties of metals and what give them these properties?
    -delocalised electrons in metallic bonds produce all their properties
    -high melting and boiling point and strong bonds need lots of energy to be broken
    -good conductors or electrical and thermal as delocalised electrons carry charge
    -most metals are malleable, can be bent or hammered or rolled into flat sheets
  • alloys harder than pure metals, T or F?

    true
  • why do we sometimes mix pure metals with other metals and what are these called?
    -to make them harder as pure metals are often too soft
    -alloys, mixture of two or more metals or a metal and another element
  • why are alloys harder than pure metals?
    different elements have different sized atoms so when another element is mixed with a pure metal the new metal atom will distort the layers of metal atoms making it more difficult for them to slide over each other making them harder