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 strengthof materials?6. Use the internet to search three (3) examples of metals which have HCP, FCC and BCCstructures. Relate the structure to the characteristic properties of each metal. Pleaseindicate the condition the given structures are observed.

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World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter14: Liquids And Solids

Section: Chapter Questions

Problem 42A

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Similar questions

The structure of graphite is given in Figure 12.19. (a) What type of intermolecular forces exist between the layers of six-member carbon rings? (b) Account for the lubricating ability of graphite. That is, why does graphite feel slippery? Why does pencil lead (which is really graphite in day) leave black marks on paper?
Which solid phase that is, which allotrope of carbon is more stable, graphite or diamond? You should consult some of the tables in the thermodynamics section of this text.. Both solid phases exist under normal conditions of pressure and temperature. Explain why this is so, given that one solid phase is more thermodynamically stable than the other. Do their unit cells provide any suggestion for their relative stabilities?
Dolomite has a very similar structure in which Mg substitutes for Ca in alternatinglayers. Assume that Ca2+ has an ionic radius of 100 picometers and Mg2+ has anionic radius of 72 picometers. Using your knowledge of crystal chemistry, would youexpect significant substitution of Mg for Ca in calcite or Ca in the Mg site indolomite?
Shown in the figure are 3 different crystallographic planes for a unit cell of an imaginary metal (the circles represent atoms). Draw each of the given plane in the x, y, z axes separately, including the complete labels of the given dimensions. Then, draw the unit cell to scale (i.e. proportional to the given dimensions) with complete labels of the axial lengths and axial angles. Lastly, identify the crystal system that the unit cell belongs to. Show solutions and necessary explanations.
What is the origin of Van der Waals forces? Why it is important in the dispersion of ceramic powders? In your discussion include DLVO theory.
Lattice parameters of α and β phases were calculated from x-ray diffraction measurements performed in A-B alloys with different compositions, all quenched from 500, 600 and 700 °C. Draw a schematic A-B phase diagram using this information
2. List four types of advanced materials and, discuss their distinctive features. Briefly define smart materials/system and give example. What type of materials do you think will be the materials of tomorrow? Discuss. 3. Show that the atomic packing factor for Body-Centered Cubic (BCC) crystal structure is 0.68. 4. Compute the theoretical density of Aluminium which has an atomic radius of 0.143 nm and an FCC crystalline structure. Compare this density with its measured density (from the literature). 5. What are elastic and plastic deformations? How do they occur? What is their difference? Explain from atomic structure point of view. Please note: Students will be expected to research topics. The use pictures is encouraged.
Explain why bimolecular condensation is a poor method for making unsymmetricalethers
Cu and Ni form a substitutional solidsolution. This means that the crystal structureof a Cu-Ni alloy consists of Ni atomssubstituting for Cu atoms in the regularatomic positions of the FCC structure. Fora Cu-30% wt.% Ni alloy, what fraction ofthe atomic sites does Ni occupy?
2. What is glass-ceramic? Please explain the differences between glass and glass & ceramics ? (Please consider microstructures and mechanical behavior etc.) a) If you want to obtain transparent diopside glaze, which oxides/raw materials will you choose, why? What parameters will you pay attention to create these crystals? Why? b) When you prepared transparent anorthite glaze, you realized that, this glaze did not show transparent property and it was completely opaque. What are the reasons for this effect? How will you solve this problem? Please explain ?
Explain how the unit cell reflects the intensive properties of a material. Is the bulk material's properties the same as its unit cells? Provide an explanation for your answer.
A crystal has a cubic unit cell of 4.2 Å. Using a wavelength of 1.54 Å at which 2θ value would you expect tomeasure the (111) peak?

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3. Compare and contrast the two types of dlose-packing in solids?