#### Answer

B

#### Work Step by Step

Selenium: Group 16, period 4
$[Ar]\ 4s^2\ 4p^4$

Published by
Cengage Learning

ISBN 10:
1133949649

ISBN 13:
978-1-13394-964-0

B

Selenium: Group 16, period 4
$[Ar]\ 4s^2\ 4p^4$

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