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JEE Main levelSingle correct optionDifficulty 2 of 3ss153

The number of atoms per unit cell of an end-centred (base-centred) cubic-type cell with atoms at 8 corners and at the centres of two opposite faces is

A1
B3
C4
D2

Answer: D

Corners:

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

. Two face centres:

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

. Total

Z = 2

.

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