Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 7 The Structure of Atoms and Periodic Trends - Study Questions: 77

Answer

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Work Step by Step

Density is mass divided by the volume, which is proportional to the radius. Atomic mass increases along the period, with the increase in the number of protons and neutrons. Atomic radius decrease along the period with the increase in effective nuclear charge. Density increases along the period because it's a division of an increasing number by a decreasing one.
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