Concept explainers
Interpretation:
The elementswhich are given can be combined with silicon to form a semiconductor is to be indicated.
Concept introduction:
Semiconductors are solids thathave conductivity lying between those of conductors and insulators.
The gap between the conduction band and the valence band is small, so electrons may jump from the valence band to the conduction band.
Conduction band: The conduction band is the band of electron orbitals that electrons can jump up into from the valence band when excited.
Valence band: The valence band is the band of electron orbitals that electrons can jump out of, moving into the conduction band when excited.
A dopant, also called a doping agent, is a trace impurity element that is inserted into a substance (in very low concentrations) to alter the electrical or optical properties of the substance.
Doping: Addition of dopant is doping.
n-Type semiconductor: A semiconductor that has been doped with electron donor atoms is called an n-type semiconductor.
p-Type semiconductor: A semiconductor that has been doped with electron acceptor atoms is called a p-type semiconductor.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
CHEMISTRY- BUNDLE CONNECT PLUS ACCESS
- QUESTION: Manganese has a density of 7.33 g/cm^3 and unit cell edge length of 3.68 Å. Calculate the atomic radius (in Å) of manganese. *Please use the pictures provided (the formula and some values that can be substitutedarrow_forwardPlease give proper answer List the two main kinds of line defects occurring in solid materials which describe macroscopic mechanical behavior of solidsarrow_forwardAnswer all please !! Density Calculation 3. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute and compare its theoretical density with the experimental value, 7.87 g/cm3.4. Zirconium has an HCP crystal structure and a density of 6.51 g/cm3. (a) What is the volume of its unit cell in cubic meters? (b) If the c/a ratio is 1.593, compute the values of c and a.arrow_forward
- 9. How do pressure and temperature affect the rate of substitution in minerals? pLEASE DONT GIVE SHORTER ANSWERarrow_forwardAnswer all 3 parts (A, B, & C). All noble gases except helium crystallize with cubic close-packed structures at very low temperatures. Cubic close-packed structures have face-centered cubic unit cells. Xenon freezes at 161.40 K. A) What is the coordination number of xenon in the solid-state? B) Of the following: Covalent bonding, Ionic bonding, dispersion forces, ion-dipole forces, dipole-dipole forces, what holds the xenon atoms in place in the solid-state? C) Xe has a density of 3.640 g/cm^3, what is the approximate radius of a xenon atom?arrow_forwardA ceramic material can be defined as an organic compound consisting of a metal or semimetal and one or more nonmetals: Group of answer choices true falsearrow_forward
- Polymer Engineering question: Please give a brief and clear answer. – Explain doping process and why this process important for conductive polymer?arrow_forwardPROBLEM SOLVING: Solve the following problems completely, neatly and orderly. Express all answers to the nearest 4th decimal place. 3. A mole of a newly discovered crystalline substance weighs 14.56 grams and displaces 2.3 mL of water. What is the density of the crystal? Find the atomic radius and density of each atom if it is a simple cubic cell? BCC? FCC? HCP?arrow_forwardWhich is/are true of ceramics? Check the right answers a) They are composed of anions and cations. b) To have a stable structure, the anions surrounding a cation must all be in contact with that cation. c) They can have silica. d) Porosities can improve their mechanical properties. e) none of the abovearrow_forward
- please answer letter b. Please help. Tysm❤️B. Choose one type of solid (metallic crystals, ionic crystals, molecular crystals, and covalent network crystals) and analyse explain in two sentences why it has these properties (strength or hardness, melting point, electrical conductibility, heat conductibility, and brittleness). Example: Metallic crystals have high melting point because a large amount of energy is needed to melt the crystal since the forces of attraction to be broke are numerous and extend throughout the crystal.arrow_forward5..Generally we add n-buLi to halogen for lithiation but sometimes addition of halogen to n-BuLi also observed,what is logic in reverse additionarrow_forwardGuided Question:(Pls Answers all this Question.) 1. In crystal growth, what is the purpose of the seed crystal? 2. What is the importance of leaving the crystal growth undisturbed? How are imperfections formed in crystal growth? Cite some examples. 3. Compare and contrast the two types of close-packing in solids? 4. Why is there % error in part II? What could be the reason for such error? 5. By understanding the structure of crystals molecularly, what is its relation to the strength of materials? 6. Use the internet to search three (3) examples of metals which have HCP, FCC and BCC structures. Relate the structure to the characteristic properties of each metal. Please indicate the condition the given structures are observed.arrow_forward
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,