From Atoms to Materials

More to discuss We heat iron and sulphur together in this experiment. Why should we do this in the fume cupboard? + Examples other than iron sulphide Are there any other reactions that may show the different properties of a compound and its constituent elements? Name some more examples. (Hint: You may consider water or carbon dioxide.) Let’s Think Fig. 13.17 A new substance (iron sulphide) is formed when iron is heated with sulphur. iron (an element) sulphur (an element) iron sulphide (a compound) The properties of a compound are different from those of its constituent elements. Experiment 13.4B When iron is heated with sulphur, a compound (iron sulphide) is formed. Its properties are different from those of its constituent elements. For example, • its colour is different from iron or sulphur; • unlike iron, it is not attracted by a magnet. Analysis and conclusion 1. Complete the following word equation: iron + sulphur 2. C ompare the properties of iron powder, sulphur powder, and a mixture of the two. What can you conclude? 3. C ompare the properties of iron sulphide and its constituent elements. What can you conclude? 48 © 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