A **face-centred cubic (fcc)** unit cell has effective number of particles:
A1
B2
C4
D6
Answer & Solution
Correct answer: C. 4
8 corners × 1/8 + 6 faces × 1/2 = 1 + 3 = **4** particles per fcc unit cell. Examples: Cu, Au, Ag, Al, Ni.
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