Electronegative element t h ter coefcient of thermal

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Unformatted text preview: tempt to slip past one another in response to the applied force, strong repulsive forces develop and lead to cracking. (c) In contrast, in a metal the electron cloud shields the positively charged atomic cores from each other so that the repulsive forces do not develop. segment, so that up to about 600% extension the polymer recovers substantially completely. Only polymers can be elastomers. | v v pg037 [R] to become a cation and this electr of the bond-energy curve. transformation in nonmetallic materials. electronegative element t h Ter coefficient of thermal expansionthat becom The equilibrium separation distance G1 bond length Schaffer 7-27060 / IRWIN / pgm 1-14-98 plm 3-21-98 MP donor level Impurity level within the band gap of a through electronegativity tTheTrelative st , which te the equation t h h between two atoms or ions. It can be estimated from coefficient gain, or attract, an electron. semiconductor associated with the extra electrons to of thermal expansion is the cons either the bond-energy curve (the point where the energy relates thermal strain to changes in tempera introduced the bond-force curve (the point where VI electronic polarization The tem is a minimum) orby the incorporation of a Group V orStructures Chapter 2 Atomic Scale 37 element into a Group IV semiconductor. coherent interface of positive and separatin An interface negative the center the total force is zero). where there is a one-to-one match of lattice drift velocity 1.9 The average velocity with which an presence of an electric field. Bragg’s law N The definingUsing the table in Appendix A, this corresponds to a d. For CdTe, E 2.1 0.2. equation of X-ray across the boundary. bond that ionic. or electrical charge carrier moves through a solid in 2d of valence electrons in CdTe is sin . diffraction,is n 1% numberTherefore, the bonding in CdTe is2either metallic we covalent. electrostatic painting A spray-p Since the average 6 2 4, predict the cold working the paint deformation ofthe s response is likely toof covalent. electric field. in which a to an external two materials bonding CdTe which Plastic particles...
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