Solid StateHard

Question

What is the void space per unit cell for metallic silver crystallizing in the FCC system, the edge length of the unit cell being 4 Å?

Options

A.47.36 Å3
B.30.72 Å3
C.20.48 Å3
D.16.64 Å3

Solution

Void space per unit cell = 0.26 × Vunitcell

$= 0.26 \times V_{\text{unit cell}} = 0.26 \times \left( 4\overset{o}{A} \right)^{3} = 16.64{\overset{o}{A}}^{3}$

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