Answer
Si, P and S are part of a period (Period 3)
Work Step by Step
From periodic table, we observe that Si, P and S are present in period 3
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 - Figure 4.2 - Page 100: 1
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