Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 2 - Test Your Understanding - Level 2 - Application/Analysis - Page 43: 7

Answer

c. H$_2$S

Work Step by Step

Hydrogen has 1 electron and needs 1 more to fill its valence shell. Sulfur has 6 valence electrons and needs 2 more to fill its shell. Therefore, there needs to be 2 hydrogens and 1 sulfur so that sulfur is able to reach its octet and the two hydrogens will have full valence shells, too.
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