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NEET levelSingle correct optionDifficulty 1 of 3ss004

The number of atoms present per unit cell of a body-centred cubic (bcc) lattice of identical atoms is

A6
B4
C2
D1

Answer: C

A bcc cell has 8 corner atoms each shared by 8 cells and 1 atom wholly inside:

8 \times \frac{1}{8} + 1 = 2

.

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