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In a face-centred cubic (FCC) cell, total number of effective atoms is
A2
B6
C4
D8
Answer & Solution
Correct answer: C. 4
1. Eight corner atoms contribute 8 × 1/8 = 1.
2. Six face-centred atoms contribute 6 × 1/2 = 3.
3. Total = 1 + 3 = 4 atoms per FCC unit cell.
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 1 "Solid State" §1.6_
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