SCIENCE+ENGR.OF MTRLS.,SI ED.,ENHANCED
7th Edition
ISBN: 9780357447888
Author: ASKELAND
Publisher: CENGAGE L
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Chapter 2, Problem 2.36P
To determine
To explain:
The differencebetween the melting temperatures of given two elements and between the melting temperatures in terms of atomic bonding.
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Answer:
1. Is there a difference in packing (coordination number) between these two types (FCC and HCP) of structures?
2. Look at the two structures. A small difference in arrangement of atoms causes a dramatic difference in the properties of FCC ductile metals and HCP brittle metals. Can you see it? Try to draw the differences (You can draw the 3-layers separately):
Chapter 2 Solutions
SCIENCE+ENGR.OF MTRLS.,SI ED.,ENHANCED
Ch. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Why is it important to consider the structure of a...Ch. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Write the electron configuration for the element...Ch. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - Prob. 2.16PCh. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - What are the bonding mechanisms in thermoplastics?Ch. 2 - Prob. 2.28PCh. 2 - Materials such as silicon carbide (SiC) and...Ch. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - Prob. 2.33PCh. 2 - Prob. 2.34PCh. 2 - In order to increase the operating temperature of...Ch. 2 - Prob. 2.36PCh. 2 - Prob. 2.37PCh. 2 - Prob. 2.38PCh. 2 - Prob. 2.39PCh. 2 - Prob. 2.40PCh. 2 - Would you expect MgO or magnesium to have the...Ch. 2 - Would you expect (Al2O3) or aluminum to have the...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Steel is coated with a thin layer of ceramic to...Ch. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49PCh. 2 - Prob. 2.50PCh. 2 - Prob. 2.51DPCh. 2 - Turbine blades used in jet engines can be made...Ch. 2 - You want to use a material that can be used for...Ch. 2 - Prob. 2.1KP
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- Tungsten (w) has a BCC structure with an atomic radius of 0.1371 nm. If the atomic weight of tungsten is 183.8 g/mol, find its theoretical density. Avogardos number is 6.022x10^23 atoms/mol.arrow_forwardCalculate the ionic characterisation value for two elements with electronegativity of 0.7 and 3.98. Enter your answer as a percentage with 2 decimal places. Answer:arrow_forwardUse the atomic radii of scandium, yttrium, lanthanum, and lutetium to answer the questions below.a. Explain why lutetium has a smaller atomic radius than lanthanum, eventhough it has a greater number of electrons.b. Do the atomic radii argue for the placement of La or Lu below Y in the periodic table? Explain.arrow_forward
- Consider two hypothetical metallic crystal structures A and B. A has an fcc and B a bcc lattice structure. Both have the same unit cell volume. The Atomic Packing Factor for A is 0.740 and that for B is 0.680. What is the ratio of the fcc to bcc atomic radii? (This question has only one correct answer) a. 0.82 b. 0.63 c. 0.92 d. 0.44 e. 1.21 Clear my choicearrow_forwardConsider two hypothetical metallic crystal structures A and b has an fcc and B a bcc lattice structure. Both have the same unit cell volume. The atomic packing factor for a is 0.740 and that for b is 0.680. what is the ratio of the fcc to bcc atomic radii? Select one of the answers below. a. 0.63 b. 0.82 c. 1.21 d. 0.92 e. 0.44arrow_forwardConsider two hypothetical metallic crystal structures A and B. A has a simple cubic and B a fcc lattice structure. Both have the same unit cell volume. The Atomic Packing Factor for A is 0.520 and that for B is 0.740. What is the ratio of the fcc to simple cubic atomic radii?arrow_forward
- Copper is a typical face-centered-cubic metal. In its pure state, it has extremely high electrical conductivity. Oxygen in copper causes a major reduction of conductivity. To investigate this issue further, I want to you to tell me whether oxygen atoms substitute for copper atoms, or if they enter interstitial sites.arrow_forwardSodium chloride (NaCl) has the rock salt crystal structure and a density of 2.17 g/cm³. The atomic weights of sodium and chlorine are 22.99 g/mol and 35.45 g/mol, respectively. (a) Determine the unit cell edge length. nm (b) Determine the unit cell edge length from the radii in the table below assuming that the Nat and Cl- ions just touch each other along the edges. nm Cation Mg2+ Fe2+ Na+ Ionic Radius (nm) 0.072 0.077 0.102 Anion Ionic Radius (nm) CI- 0²- 0.181 0.140arrow_forwardCompute the percent ionic and covalent character (%IC) of the interatomic bond that forms between gold and copper; magnesium and oxygen.arrow_forward
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