(a)
Interpretation:
Silicon doped with indium should be classified as p or n -type semiconductor.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, bands are a continuum of energy levels. The bands are of two types: valence band and conduction band.
The band that holds valence electrons is valence band and band that is slightly higher in energy than valence band is conduction band. On the basis of band theory, partly filled band shows conduction and are called conductors, and fully filled band doesn’t show conduction and are insulators.
(b)
Interpretation:
Germanium doped with antimony should be classified as p or n -type semiconductor.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, bands are a continuum of energy levels. The bands are of two types: valence band and conduction band. The band that holds valence electrons is valence band and band that is slightly higher in energy than valence band is conduction band.
On the basis of band theory, a partly filled band shows conduction and are called conductors, and fully filled band doesn’t show conduction and are insulators.
(c)
Interpretation:
Gray tin doped with arsenic should be classified as p or n -type semiconductor.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, bands are a continuum of energy levels. The bands are of two types: valence band and conduction band. The band that holds valence electrons is valence band and band that is slightly higher in energy than valence band is conduction band.
On the basis of band theory, a partly filled band shows conduction and are called conductors, and fully filled band doesn’t show conduction and are insulators.

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Chapter 12 Solutions
LCPO CHEMISTRY W/MODIFIED MASTERING
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