Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 2 - Atoms, Molecules, and Ions - Questions - Page 73: 18

Answer

Halogens are highly electronegative while alkali metals are high electropositive.

Work Step by Step

Halogens are electronegative elements that is they gain an electron when react with other elements in order to complete their octet. On the other hand, alkali metals are electopositive elements and they either lose their outer shell electron to form an ionic bond or share with other elements to form a covalent bond.
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