From Atoms to Materials

There are many other patterns in the Periodic Table. Visit online interactive Periodic Tables for more information. Checkpoint 13.3B 1. Circle T for a true statement and F for a false one. (a) Lithium is a Group I element. T / F (b) Chlorine and oxygen belong to the same group in the T / F Periodic Table. (c) All Group VII elements are unreactive. T / F (d) Sodium is more reactive than lithium. T / F 2. Shown on the right is Group II of the Periodic Table. It is known that: From the information above, predict the reactivity of the following elements with water: (a) beryllium (Be) (b) barium (Ba) Extension •  Both magnesium and calcium react with cold water. Hydrogen gas is produced. • Magnesium reacts very slowly with water. •  Calcium reacts with water at a moderate rate. Snapshot Other patterns in the Periodic Table The Periodic Table is very helpful in the study of chemistry. By knowing the patterns in the Periodic Table, we can understand the properties of elements much more easily. For example, across a period, the elements change from metals through semi-metals to non-metals. metals semi-metal non-metals 41 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