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 - Additional Exercises - Page 294: 7.80a



Work Step by Step

Because 2s shows an initial peak between $0 \dot{A}$ and $0.5 \dot{A}$ while 2p does not begin to increase until almost $0.5 \dot{A}$, 2s has greater electron density close to the nucleus.
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