(1.52C-1.54C) Metallic Bonding

What type of bonding is found between the atoms in metal elements?

Metallic Bonding

What is metallic bonding?

The electrostatic attraction between the negatively charged delocalised electrons and the positively charged metal ions.

How are metal ions formed?

A metal atom loses all of the electrons from its outer shell, leaving it with a full outer shell and a positive charge.

What happens during metallic bonding?

• The lost electrons move into a ‘sea’ of delocalised electrons

• The ions held together by the electrostatic attraction between the positive metal ions and the negative delocalised electrons

• The ions are bonded together in a giant metallic lattice

How can a metallic lattice be representing by a 2-D diagram?

Draw the ions in a grid- use a key to show that one circle represents a full ion.

Have delocalised electrons among them

What is the main factor that affects the strength of the metallic bonding in a metal?

The higher the charge of the ion, the stronger the bonding.

Why are metals good conductors of electricty?

For a material to be a good conductor, there needs to be free to move, charged particles.

In solid metals- delocalised electrons

In liquid metals- delocalised electrons + ions free to move due to liquid particles

Why are metals malleable?

The metal ions are arranged in layers so they are free to move and slide over each other.