Answer
Please see the work below.
Work Step by Step
We know that the radius decreases as we move across the period from left to right while it increases when we move down the group. Thus, in increasing order of radius $Be, Mg, Na$
General Chemistry 10th Edition
by Ebbing, Darrell; Gammon, Steven D.
Published by
Cengage Learning
ISBN 10:
1-28505-137-8
ISBN 13:
978-1-28505-137-6
Chapter 8 - Electron Configurations and Periodicity - Exercises - Page 320: 8.6
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