The number of atoms contained in a fcc unit cell of a monatomic substance is:
A
1
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B
2
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C
8
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D
4
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Solution
The correct option is D 4 In face centred cubic unit cell (fcc) each particles are at corner and at face ∴ Contribution of one unit cell = each 8 atoms contribute 1/8 + 1/2 atom on face