Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 7 - Periodic Properties of the Elements - Exercises - Page 290: 7.3a


The sphere on the right is the largest, so from left to right the spheres represent: $Mg^{2+}\rightarrow K^+ \rightarrow Cl^-\rightarrow Se^{2-}$

Work Step by Step

The radius of the atom decreases as the positive charge increases, so the atom with the biggest positive charge has the smallest radius. $Mg^{2+}\lt K^+ \lt Cl^-\lt Se^{2-}$
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