From Atoms to Materials

Caution DO NOT touch the rods after they are heated. Set up the apparatus as shown. 1 Using a Bunsen burner, heat the end of the rods without wax. Observe the order in which the pins fall. 2 Wear safety goggles. metal strip Caution Mind your fingers when using the hammer. iron rod wax pin aluminium rod copper rod Results Aluminium Iron Copper Ammeter reading (A) Order that the pins fall (1: first, 3: last) Which metals change shape when hit by a hammer? B. Thermal conductivity (Demo) C. Malleability Place each metal strip on a chopping board. Hammer it several times. Observe any damage or change in shape to the metal strip, and record your observations. 61 13 From Atoms to Materials © 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