Concept explainers
(a)
Interpretation:
The number of atoms in one-body centered cubic unit cell of a metal has to be given.
Concept Introduction:
Body-centered unit cell:
A body – centered cubic cell is a type of unit cell with atoms arranged in all the vertices of the unit cell and one atom at the center of the cube.
Figure 1
(b)
Interpretation:
The number of atoms in face-centered cubic cell has to be given.
Concept Introduction:
Face-centered cubic unit cell:
In crystalline solids, the components are packed in regular pattern and neatly stacked. The components are imagined as spheres and closely packed. This phenomenon is called “close packing” in crystals. The two major types of close packing of the spheres in the crystal are hexagonal close packing and cubic close packing.
Cubic close packing structure has face-centered cubic (FCC) unit cell.
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General Chemistry: Atoms First
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