Chemistry notes

• Metals


  • They share atoms with the whole metal
  • This makes it positive
• Alloys


  Two different metal or 1 non metal
• Alloys


  • Different sizes atoms disrupt metal structure
  • Layers can no longer slide - making it much harder than pure metal
• Alloys


  • Two or more different elements
  • At least one metal
  • Mixed together
• Bigger atoms
• Group 1 metals


  • Stored in oil
  • Acts as a barrier
  • Stops it oxidising when in contact with air
• Metal atoms


  • Share electrons with the whole metal
  • This turns the metal positive
  • These electrons are attracted to the other nuclei in the structure
  • Strong electrostatic forces of attraction between positive ions and the sea of de localised electrons
• Metals


  • High melting and boiling point
  • A lot of energy required to break the structure
  • De localised electrons move throughout the structure and can carry electricity and heat
  • Malleable and because they are in such a regular structure layers of metal can slide over each other
• Alloys


  • 2 or more different elements, at least one of them being a metal, mixed together
  • Steel (carbon iron)
• Alloys


  • Different sized metal atoms disrupt the regular structure and stops the layers sliding over each other
  • Alloys are less malleable