Solid State - Result Question 31

####31. The number of atoms in one of this hcp unit cell is

(2008,3×4M=12M)

(a) 4

(b) 6

(c) 12

(d) 17

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Answer:

Correct Answer: 31. (b)

Solution:

A hcp unit cell

Contribution of atoms from corner =1/6

Contribution from face centre =1/2

Total number of atoms per unit cell =12×16+2×12+3=6



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