Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 8 - Sections 8.1-8.9 - Exercises - Problems by Topic - Page 376: 59a



Work Step by Step

$K:[Ar]4s^{1}$ The atomic number for argon is 18, which means there are $S=18$ electrons. $Z_{eff}$$=$$Z-S$$=19-18$$=+1$
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