METALLIC BONDING

• WHAT IS METALLIC BONDING?

  electrostatic attraction between lattice of positive metal ions and delocalised outer shell electrons
• CAN METALLICALLY BONDED COMPOUNDS CONDUCT ELECTRICITY/ HEAT?

  yes
• WHY CAN METALLICALLY BONDED COMPOUNDS CONDUCT?

  sea of delocalised electrons which are free to move
• PHYSICAL CHARACTERISTIC OF METALLICALLY BONDED COMPOUNDS?

  malleable
• WHY ARE METALLICALLY BONDED COMPOUNDS MALLEABLE?

  arranged in layers (can slide)
• HOW TO CALCULATE STRENGTH OF METALLIC BONDING?

  smaller metal ions = greater charge on ions = more delocalised outer shell electrons = stronger attraction
• HOW TO STRUCTURE AN EXAMPLE ANSWER FOR WHICH OF THE TWO METALS HAS A STRONGER METALLIC BONDING?

  • X has a higher melting point
  • As it has a smaller atomic radius than Y
  • Also more highly charged
  • Has more delocalised electrons
  • Therefore it has a stronger metallic bonding