Topic 1 - metallic bonding

Question 1

Structure of metallic bonding including:

Answer 1

delocalised electrons
positive metal ions
the regular lattice structure

Question 2

Metallic Structure

Answer 2

Metal atoms lose outer electrons

Metal atoms become positive ions

Free electrons are called delocalised electrons

There is a strong force of attraction between the positive ions and the negative electrons

Question 3

Strong electrostatic force of attraction

Answer 3

between the positive metal ion and the negative delocalised electron.

Question 4

Sodium or magnesium?

Answer 4

Magnesium has the outer electronic structure 3s2. Both of these electrons become delocalised, so the “sea” has twice the electron density as it does in sodium. The remaining “ions” also have twice the charge and so there will be more attraction between “ions” and “sea”.

Question 5

Structure

Answer 5

Layers of metal ions

Layers can slip over each other

Delocalised electrons

Strong force of attraction between metal ion and delocalised electron

Question 6

Properties

Answer 6

Solids
Conduct electricity
Sonorous
Malleable
Ductile
Conduct heat
Strong
High melting points
High boiling points