
(a)
Interpretation:
The given semiconductor has to be classified as n-type or p-type semiconductor.
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.
p-type semiconductor:
p-type doped semiconductor is the one in which holes (positive charge) are present in valence band. Example: silicon doped with boron.
n-type semiconductor:
This type of doped semiconductor is the one in which many free electrons are present in conduction band.
(b)
Interpretation:
The given semiconductor has to be classified as n-type or p-type semiconductor.
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.
p-type semiconductor:
p-type doped semiconductor is the one in which holes (positive charge) are present in valence band. Example: silicon doped with boron.
n-type semiconductor:
This type of doped semiconductor is the one in which many free electrons are present in conduction band.
(c)
Interpretation:
The given semiconductor has to be classified as n-type or p-type semiconductor.
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.
p-type semiconductor:
p-type doped semiconductor is the one in which holes (positive charge) are present in valence band. Example: silicon doped with boron.
n-type semiconductor:
This type of doped semiconductor is the one in which many free electrons are present in conduction band.

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Chapter 21 Solutions
General Chemistry: Atoms First
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