(a)
Interpretation:
From the given pictures, the material that relates to it has to be identified.
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 is a type of doped semiconductor in which many free electrons are present in conduction band.
p-type: This is a type of doped semiconductor in which holes are present in conduction band.
Insulator: Insulators are one, in which electrons are filled in valence band with a vacant conduction band and they are parted away by band gap.
Figure 1
(b)
Interpretation:
The ascending order of electrical conductivity of given materials has to be arranged.
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 is a type of doped semiconductor in which many free electrons are present in conduction band.
p-type: This is a type of doped semiconductor in which holes are present in conduction band.
Insulator: Insulators in which electrons are filled in valence band with a vacant conduction band and they are parted away by band gap. Insulators does not conduct electricity.
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General Chemistry: Atoms First
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