Concept explainers
(a)
Interpretation:
Valence band should be defined.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, Bands are continuum of energy levels. The bands are of two types: valence band and conduction band.
Valence band is the band that holds valence electrons and conduction band is the band which is slightly higher in energy than valence band. On the basis of band theory, a partly filled band shows conduction and fully filled band doesn’t show conduction.
(b)
Interpretation:
Conduction band should be defined.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, Bands are continuum of energy levels. The bands are of two types: valence band and conduction band.
Valence band is the band that holds valence electrons and conduction band is the band which is slightly higher in energy than valence band. On the basis of band theory, a partly filled band shows conduction and fully filled band doesn’t show conduction.
(c)
Interpretation:
Band gap should be defined.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, Bands are continuum of energy levels. The bands are of two types: valence band and conduction band.
Valence band is the band that holds valence electrons and conduction band is the band which is slightly higher in energy than valence band. On the basis of band theory, a partly filled band shows conduction and fully filled band doesn’t show conduction.
d)
Interpretation:
Doping should be defined.
Concept introduction:
According to band theory, solids are classified as conductors, semiconductors, and insulators.
As per band theory, Bands are continuum of energy levels. The bands are of two types: valence band and conduction band.
Valence band is the band that holds valence electrons and conduction band is the band which is slightly higher in energy than valence band. On the basis of band theory, a partly filled band shows conduction and fully filled band doesn’t show conduction.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
CHEMISTRY-MASTERINGCHEMISTRY W/ETEXT
- 1.(a) Name two Energy Bands at which current is produced in silicon b) A certain atom has four valence electrons, what type of atom is it?arrow_forwardAccount for the relative band gap energies of semiconductors interms of periodic trends?arrow_forwardAccount for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity of silicon increases on doping it with phosphorus.arrow_forward
- (a) Determine the number of calcium ions in the chemicalformula of the mineral hardystonite, CaxZn(Si2O7). (b)Determine the number of hydroxide ions in the chemicalformula of the mineral pyrophyllite, Al2(Si2O5)2(OH)x.arrow_forwardPredict the structure of each of the following silicate minerals (network, sheets, double chains, and so forth). Give the oxidation state of each atom.(a) Apophyllite, KCa4(Si8O20)F ? 8 H2O(b) Rhodonite, CaMn4(Si5O15)(c) Margarite, CaAl2(Al2Si2O10)(OH)2arrow_forwardWould you expect carborundum(SiC) to adopt a diamond structure or one of higher coordination? Explain why?arrow_forward
- The earthy impurities associated with mineral used in metallurgy are called(a) Slag(b) Flux(c) Gangue(d) Orearrow_forwardStructure of the Bis-( dimethylglyoximato) nickel(II) ( write the C.N , geometry type):arrow_forwardDescribe the nature of electrical conduction in (a) germa- nium doped with indium and (b) cadmium sulfide doped with arsenic.arrow_forward
- 2. What is the coordination number structure formed by most semiconductors and electronic materials (GaAs, Cds)arrow_forwardA compound which is prepared from gypsum has the property of hardening when mixed with proper quantity of water.(i) Identify the compound.(ii) Write the chemical equation for its preparation.(iii) Mention one important use of this compound.arrow_forwardWhich of the following chemical tests can be used to distinguish the two compounds? (a) Lucas test (b) Jones test (c) hot, acidic KMnO4 (d) FeCl3 testarrow_forward
- Principles of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning