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State whether the following statement is ‘True’ or ‘False’. (2 × 10 = 20) Give a brief explanation for each of your answers, as applicable. Alpha-Polonium has a body-centered cubic structure. True    False A dislocation loop must always be a mixed dislocation. True   False Divacancies in any metal are present at much higher concentration than monovacancies. True False Generally, a quenched metal has a higher electrical resistivity than an annealed metal. True False Shockley partials are considered glissile in nature. True  False Wider stacking faults make cross-slip more difficult, that is why cross-slip in brass (Cu-Zn) is more difficult than copper (Cu). True False According to Hume-Rothery’s rule, the solvent and solute in a substitutional solid solution must have 5% size difference. Pearson symbol of copper cP2. True   False Frank partial is a sessile dislocation. True   False Edge dislocations can cross-slip to move to other slip planes. True   False

State whether the following statement is ‘True’ or ‘False’. (2 × 10 = 20) Give a brief explanation for each of your answers, as applicable. Alpha-Polonium has a body-centered cubic structure. True    False A dislocation loop must always be a mixed dislocation. True   False Divacancies in any metal are present at much higher concentration than monovacancies. True False Generally, a quenched metal has a higher electrical resistivity than an annealed metal. True False Shockley partials are considered glissile in nature. True  False Wider stacking faults make cross-slip more difficult, that is why cross-slip in brass (Cu-Zn) is more difficult than copper (Cu). True False According to Hume-Rothery’s rule, the solvent and solute in a substitutional solid solution must have 5% size difference. Pearson symbol of copper cP2. True   False Frank partial is a sessile dislocation. True   False Edge dislocations can cross-slip to move to other slip planes. True   False

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter22: Inorganic Materials
Section: Chapter Questions
Problem 26P
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  1. State whether the following statement is ‘True’ or ‘False’. (2 × 10 = 20)

Give a brief explanation for each of your answers, as applicable.

  1. Alpha-Polonium has a body-centered cubic structure. True    False
  2. A dislocation loop must always be a mixed dislocation. True   False
  3. Divacancies in any metal are present at much higher concentration than monovacancies. True False
  4. Generally, a quenched metal has a higher electrical resistivity than an annealed metal. True False
  5. Shockley partials are considered glissile in nature. True  False
  6. Wider stacking faults make cross-slip more difficult, that is why cross-slip in brass (Cu-Zn) is more difficult than copper (Cu). True False
  7. According to Hume-Rothery’s rule, the solvent and solute in a substitutional solid solution must have 5% size difference.
  8. Pearson symbol of copper cP2. True   False
  9. Frank partial is a sessile dislocation. True   False
  10. Edge dislocations can cross-slip to move to other slip planes. True   False
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