Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 1 - The Nature of Chemistry - Exercise 1.11 - Exploring the Periodic Table - Page 34: 2

Answer

There are 18 elements in fifth period, starting from Rb and ending at Xe.

Work Step by Step

Recall, a period is a horizontal row on the periodic table. Thus, using the periodic table, we find: There are 18 elements in fifth period, starting from Rb and ending at Xe.
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