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© Oxford University Press 2011 IC Images Images

© Oxford University Press 2011 IC Images Many items we use every day are made of plastics

© Oxford University Press 2011 IC Images Many items we use every day are made of plastics

© Oxford University Press 2011 IC Images Many items we use every day are made of plastics

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

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

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

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