Answer
B
Work Step by Step
Selenium: Group 16, period 4
$[Ar]\ 4s^2\ 4p^4$
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 7 The Structure of Atoms and Periodic Trends - 7-3 Electron Configurations of Atoms - Review & Check for Section 7-3 - Page 263: 1
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