1. © Oxford University Press 2011 IC1.19.2 Images Images

2. © Oxford University Press 2011 IC1.19.2 Images Many items we use every day are made of plastics

3. © Oxford University Press 2011 IC1.19.2 Images Many items we use every day are made of plastics

4. © Oxford University Press 2011 IC1.19.2 Images Many items we use every day are made of plastics

5. © Oxford University Press 2011 IC1.19.2 Images Polythene molecules are made by joining together thousands of ethene molecules. Only a small part of the polythene molecule is shown.

6. © Oxford University Press 2011 IC1.19.2 Images Each paper clip represents a monomer molecule. The chain represents the polymer.

7. © Oxford University Press 2011 IC1.19.2 Images The formula of propene is C 3 H 6. Its atoms are joined together like this.

8. © Oxford University Press 2011 IC1.19.2 Images Thousands of propene molecules join together in long chains to make poly(propene). You can represent the reaction like this.