2.4 From models to materials

• Ionic ↔ covalent ↔ metallic

• Bonding triangle representation

• Position determined by relative contributions of three bonding types

• Predict properties from position

• Use electronegativity data to place compounds in the bonding triangle

• Mixtures of metals with enhanced properties

• Non-directional bonding

• Macromolecules from repeating monomers

• Properties of plastics

• Form by breaking double bonds in monomers

• Represent repeating units from given alkene monomers