Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 14 - Problems: 14.18

Answer

See explanation below.

Work Step by Step

Group 2A elements have largest atomic radii and smallest atomic mass in corresponding periods. That's why group 2A elements have low densities.
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