Concept explainers
(a)
Interpretation:
The energy band for molecular orbital and electron population of a semiconductor has to be drawn. Also higher electrical conductivity of semiconductor than metallic conductor has to be explained.
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 type of doped semiconductor is the one in which many free electrons are present in conduction band.
p-type: This type of doped semiconductor is the one in which holes are present in conduction band.
Conductor: Any materials which can conducts electricity are known as conductor. There is no band gap in metallic conductor and electrons can easily travel.
(b)
Interpretation:
The energy band for molecular orbital and electron population of a metallic conductor has to be drawn.
Concept introduction:
Conductor:
Any materials which can conducts electricity are known as conductor. There is no band gap in metallic conductor and electrons can easily travel.
Want to see the full answer?
Check out a sample textbook solutionChapter 21 Solutions
General Chemistry: Atoms First
- 8.96 A business manager wants to provide a wider range of p- and n-type semiconductors as a strategy to enhance sales. You are the lead materials engineer assigned to communicate with this manager. How would you explain why there are more ways to build a p-type semiconductor from silicon than there are ways to build an n-type semiconductor from silicon?arrow_forwardIdentify the following as either p- or n- type semiconductors.(a) germanium doped with arsenic(b) silicon doped with phosphorus(c) germanium doped with indium(d) germanium doped with antimonyarrow_forwarda) Explain the band structure of an electrical conductor (metal), a semiconductor, and an insulator at 0 K by showing the valence and conduction bands and fermi energy levels. Explain how the electrical conduction takes place in these three types of materials. Give an example for each type of material. b)Explain what n and p-type semiconductors are using their band structures. Why?arrow_forward
- (a) Why electrical conductivity of the semiconductor increases with increase in temperature? Illustrate and explain the above effect with hypothetical band energy diagrams, showing one at 25 °C and another at 50 °C? (b) The number average molecular weight of polyvinyl chloride (PVC) is 110000 g/mol and the Polydispersity index (PDI) is 1.3. What is the weight average molecular weight and degree of polymerization of PVC? Note: Molar mass of vinyl chloride is 62.498 g/molarrow_forwardite form of iron has fcc crystal lattice structure,whereas its alpha form has bcc crystal lattice structure. Assuming closest packed arrangement of iron atoms, what will be the ratio of density of Austenite to that of alpha iron?arrow_forwardWhat is the coordination number for(a) an octahedral void(b) a tetrahedral void.arrow_forward
- Name the exact type of electronic structure and give an example compound for each of the energy level diagrams shown overleaf (A-D), explain your reasoning in each case. HET Oxygen p band (A) Metal bands Aarrow_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_forwardWhich of the following descriptions does not represent the metallic hydrides? A) Metallic hydrides do not obey stoichiometric rules B) Metallic hydrides are formed by heating hydrogen gas with the metals or their alloys. C) Metallic hydrides are volatile in nature D) Titanium (Ti), zirconium (Zr), and hafnium (Hf) will form metallic hydrides when they adsorb hydrogen and release heatarrow_forwardWhat do Doped semiconductors contain?arrow_forward(c) Explain what happens when a pure semiconductor made up of Silicon is doped with an Indium atom during manufacture. Explain on the availability of the Carriers created as a result of this doping with the help of a neat sketch.arrow_forwardSketch the band structure of a Li AND a Si crystal. (ii) How would you expect the electrical conductivity in Li AND Si crystals to vary with temperature? (iii) Account for the fact that the conductivity of Si is enhanced by the addition of small amounts of B.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Chemistry for Engineering StudentsChemistryISBN:9781337398909Author:Lawrence S. Brown, Tom HolmePublisher:Cengage LearningPrinciples of Modern ChemistryChemistryISBN:9781305079113Author:David W. Oxtoby, H. Pat Gillis, Laurie J. ButlerPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning