Answer
Na has the lowest ionization energy in period 3.
Work Step by Step
Ionization energy increases from left to right across the periodic table. Na lies at the far left of the period.
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 4.7 - Trends in Periodic Properties - Challenge Questions - Page 131: 4.107d
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