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NEET levelSingle correct optionDifficulty 1 of 3ss057

How many atoms belong to one face-centred cubic (fcc) unit cell?

A2
B4
C6
D14

Answer: B

Corners give

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

and face centres give

6 \times \frac{1}{2} = 3

, so the total is 4 atoms.

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