From Atoms to Materials

Similarities between elements of the same group How do elements in the same group behave? The following experiment may give you some ideas. C 13.3A How do elements in the same group behave? Experiment Caution •  Magnesium granules and calcium granules are flammable. Keep them away from fire. •  Dilute hydrochloric acid is irritant. magnesium granules 2–3 flammable calcium granules 2–3 flammable carbon (graphite) granules 2–3 dilute hydrochloric acid 1 bottle irritant wooden splints several test tubes 3 test tube rack 1 rubber stoppers 3 forceps 1 pair heatproof mat 1 gas lighter 1 Materials and ap p a r a t u s Wear safety goggles. Wear gloves. Using forceps, put 2−3 magnesium, calcium and carbon granules into the three test tubes respectively, as shown below. 2 dilute hydrochloric acid calcium granule magnesium granule carbon granule dilute hydrochloric acid calcium granule magnesium granule carbon granule inverted rubber stopper Add about 3 cm 3 of dilute hydrochloric acid to each of three test tubes. 1 Immediately cover the mouth of each test tube with an inverted rubber stopper. 3 Caution DO NOT touch the granules with your bare hands. Use forceps to handle them. Steps Video How do elements in the same group behave? 34 © 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