Answer
Selenite ion.
Work Step by Step
Selenium and sulfur are in the same group. Sulfur forms sulfite ion $SO_{3}^{2-}$ similarly, selenium forms selenite ion $SeO_{3} ^{2-}$
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 2 - Atoms, Molecules, and Ions - Additional Exercises - Page 79: 2.107b
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