
Concept explainers
(a)
Interpretation:
The energy band for molecular orbital and electron population of a semiconductor has to be drawn. Also higher electrical conductivity of semiconductor than metallic conductor has to be explained.
Concept introduction:
Semiconductor: A material which can conduct electricity in range between a metal and an insulator is known as semiconductor. Addition of small amount of impurities increases conductivity of semiconductor and the process is known as doping. n-type and p-type are two types of doped semiconductors.
n-type: This type of doped semiconductor is the one in which many free electrons are present in conduction band.
p-type: This type of doped semiconductor is the one in which holes are present in conduction band.
Conductor: Any materials which can conducts electricity are known as conductor. There is no band gap in metallic conductor and electrons can easily travel.
(b)
Interpretation:
The energy band for molecular orbital and electron population of a metallic conductor has to be drawn.
Concept introduction:
Conductor:
Any materials which can conducts electricity are known as conductor. There is no band gap in metallic conductor and electrons can easily travel.

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Chapter 21 Solutions
General Chemistry: Atoms First
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