Chemistry, Eighth Edition Steven S. Zumdahl and Susan A. Zumdahl Publisher: Charles Hartford Senior Development Editor: Rebecca Berardy Schwartz Associate Editor: Stephanie VanCamp Editorial Assistant: Jon Olafsson Senior Media Editor: Rebecca Berardy Schwartz Senior Marketing Manager: Nicole Hamm Marketing Assistant: Kevin Carroll Marketing Communications Manager: Linda Yip OWL Producers: Stephen Battisti, Cindy Stein, David Hart (Center for Educational Software Development, University of Massachusetts, Amherst) Content Project Manager, Editorial Production: Cathy L. Brooks Creative Director: Rob Hugel Art Director: Jill Haber Print Buyer: Miranda Klapper Permissions Editor: Tracy Metivier Text Designer: Jerilyn Bockorick Art Editor: Jessyca Broekman Photo Researcher: Sharon Donahue Copyeditor: James Madru Illustrator: Patricia Rossi Cover Image: © Natural Selection Tony Sweet/Design Pi Compositor: Aptara®, Inc.