Metallic bonding

• Giant structure – particles are arranged in a regular,

  layered pattern and Positive ions and electrons attract each other (a metallic

  bond)
• In metallic bonding, There is a sea of delocalised electrons
• Metallic bonding occurs in metallic elements and alloys and Atoms share delocalised electrons
• Electrons in the outer shell of metal atoms are delocalised and can move throughout the whole structure – this means that they can conduct electricity
• Sharing delocalised electrons means metallic bonds are very strong – this means that they have very high melting points
• The atoms are arranged in layers of a graphite that can easily slip and slide over each other – this makes them malleable and ductile
• delocalised electrons are able to move throughout the structure very fast and therefore can transmit the heat quickly, atoms also vibrate and pass the heat energy onto their neighbouring atoms therefore they can transmit the heat between the atoms too – this makes them good

  conductors of heat
• Alloys are a mixture of a metal and another element. As the atoms

  are different sizes the layered structure is disrupted and this

  means that they are much stronger than pure metals.

  Elements can be chosen to give the alloys specific properties

  e.g. in stainless steel.
• This is metallic bonding