Answer
Mg has a smaller atomic size and a higher ionization energy than Cs.
Work Step by Step
Atomic size decreases as we move up the table. Ionization energy increases as we move up the table.
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 - Questions and Problems - Page 125: 4.60
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