50 QUESTION 50In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as theantibonding orbitals that are completely empty are referred to as thewhile thesingle bond, antibondconduction band, valence bandvalence band, conduction bandn-type, p-typep-type, n-type

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Answered: In a semiconductor, the bonding…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter12: The Solid State

Section: Chapter Questions

Problem 21PS

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1. "Band structure" of "Hatom chain" and "H mole chain" are drawn as "graphs" and "intermediate process".Describe it in detail.2. Describe "SP2 and SP3 bonding" and describe "crystal structure" according to each "bonding structure" in "carbon crystal structure"Describe the 'difference and reason for electrical conductivity' accordingly.
1. "Band structure" of "Hatom chain" and "H mole chain" are drawn as "graphs" and "intermediate process".Describe it in detail.2. Describe "SP2 and SP3 bonding" and describe "crystal structure" according to each "bonding structure" in "carbon crystal structure"Describe the 'difference and reason for electrical conductivity' accordingly. Please type in the answer, not handwritten, except for the graph.Thank you for your answer.
The gap between valence and conduction bands in diamond is 5.47 eV. (a) What is the maximum wavelength of a photon that can excite an electron from the top of the valence band into the conduction band? In what region of the electromagnetic spectrum does this photon lie? (b) Explain why pure diamond is transparent and colorless.
When you shine light of band gap energy or higher on asemiconductor and promote electrons from the valenceband to the conduction band, do you expect the conductivityof the semiconductor to (a) remain unchanged,(b) increase, or (c) decrease?
The maximum wavelength of light that a certain silicon photocell can detect is 1.11 μm. (a) What is the energy gap (in electron volts) between the valence and conduction bands for this photocell? (b) Explain why pure silicon is opaque.
Explain process of doping with example.
Diffusion does not have an effect on______.a) Doping in semiconductorsb) Production of alloysc) Heat treatment of metalsd) Catalysis
CdS has a band gap of 2.4 eV. If large crystals of CdS are illuminatedwith ultraviolet light, they emit light equal tothe band gap energy. (a) What color is the emitted light?(b) Would appropriately sized CdS quantum dots be able toemit blue light? (c) What about red light?
Account for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity of silicon increases on doping it with phosphorus.
Classify as n-type or p-type a semiconductor formedby doping {a) germanium w ith phosphorus. {b) germaniumw ith indium
1. Compute percent ionic character of gallium phosphide (GaP) given electronegativity for Ga is 1.6 and that for P is 2.1. 2. What type(s) of bonding would be expected for the following materials: (a) brass, (b) rubber, (c) solid xenon, (d) aluminum sulfide, and (e) nylon. 3. Given that atomic radius is 0.143 nm and crystal structure FCC, calculate the theoretical density of aluminum.
Does a photon of red light with a frequency of 4.29 * 1014 Hzhave sufficient energy to promote an electron from the valenceband to the conduction band in a sample of silicon (the band gapin silicon is 1.11 eV)?

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In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the antibonding orbitals that are completely empty are referred to as the single bond, antibond while the conduction band, valence band valence band, conduction band n-type, p-type p-type, n-type