Consider the unit cell of a face-centred cubic structure of platinum (Pt) atoms, each with radius 139 pm. The unit cell and arrangement of atoms centred on a plane within the unit cell are shown below.
Consider the unit cell of a face-centred cubic structure of platinum (Pt) atoms, each with radius 139 pm. The unit cell and arrangement of atoms centred on a plane within the unit cell are shown below.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Consider the unit cell of a face-centred cubic structure of platinum (Pt) atoms, each with radius 139 pm. The unit cell and arrangement of atoms centred on a plane within the unit cell are shown below.
Transcribed Image Text:Consider the unit cell of a face-centred cubic structure of platinum (Pt) atoms, each with radius 139 pm. The unit
cell and arrangement of atoms centred on a plane within the unit cell are shown below.
A
What is the repeat distance (in nm) along the direction AB? Enter your answer accurate 3 significant
figures. Do not include units as part of your answer.
Number
nm
Number
A
What is the linear density (in atoms nm-¹) along the direction AB? Enter your answer accurate to 3
significant figures. Do not include units as part of your answer.
Number
atoms nm-1
What is the planar density (in atoms nm-2) of the plane shown above? **Hint: The height of the triangular
plane can be determined in terms of the lattice parameter by considering the geometry of how the plane passes
through the unit cell. Enter your answer accurate to 3 significant figures. Do not include units as part of your
answer.
atoms nm-2
What is the packing fraction of the plane shown above? Enter your answer accurate to 3 significant
figures.
Number
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