From Atoms to Materials

Checkpoint 13.6B (a) Plastic bag Reasons: (b) Coatings on a USB cable Reasons: 1. Polythene molecules are made by allowing many (a) molecules to join together. This reaction is called (b) . In this reaction, (c) is the monomer, and (d) is the polymer. 2. Each object below is made of a certain plastic, as indicated by the label. Suggest two reasons why that plastic is chosen to make that object. There are many types of plastics. Their uses depend on their particular properties. polythene polyvinyl chloride 96 © United Prime Educational Publishing (HK) Limited 2024 All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher. Sample