Answer
The strontium element (Sr) is in Period $5$.
Work Step by Step
Using the periodic table on page 100, we can see that the element represented by "Sr" (Strontium) is in Period 5.
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 4 - Section 4.2 - The Periodic Table - Study check 4.3 - Page 101: c
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