Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 12 The Solid State - Study Questions - Page 467b: 19


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Work Step by Step

Above 0 K, some electrons will be promoted to higher energy levels creating two singly-occupied orbitals per electron moving, one where it came from and one where it went to. The "hole" in the orbital previously occupied creates a relative positive charge in relation to the other electrons, while the newly occupied orbital gets a negative charge. Conductivity exists because electrons move away from the newly added negatively charged orbital and towards the relatively positive charged orbital.
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