Answer
The chemical properties of elements are largely determined by the number of valence electrons they contain.
Work Step by Step
Their properties are periodic because the number of valence electrons are periodic.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 8 - Sections 8.1-8.9 - Exercises - Review Questions - Page 375: 24
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