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Ch. 8:
Sec. 8.3
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Emily M
Chem 167
Burnett
10/31/13
1. How does the “sea of electrons” model of metallic bonding explain why metals are good
conductors of electricity?
2. What is the difference between a bonding orbital and an antibonding orbital?
3. Draw band structures for a metal, insulator, and semiconductor.
4. The conductivity of semiconductors increases as temperature is increased. Using band
theory, explain this observation.
5. Using the semiconductor Germanium, give an example of an atom that would result in
both n-type and p-type doping.
6. Rank the following elements in order of increasing conductivity by considering the band
theory of bonding in solids.
(a)Sr (b)Ti (c)C (d)Si doped with As (e)Si
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