Answer
$K\gt Na \gt Mg >B$
Work Step by Step
We see that atomic radius increases as you go down the periodic table and decreases as you go left to right. Using this, we find:
$K\gt Na \gt Mg >B$
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 5 - Electron Configurations and the Periodic Table - Problem Solving Practice 5.11 - Page 227: a
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