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 A cubic unit cell has atoms only at the corners. What is the total number of atoms per unit cell?

 

Option: 1

1


Option: 2

2


Option: 3

4


Option: 4

8


Answers (1)

best_answer

 In a cubic unit cell with atoms only at the corners, each corner atom is shared equally between 8 adjacent unit cells. Therefore, the contribution of each corner atom to the unit cell is .\frac{1}{8}

 

Number of corner atoms in a unit cell = 8

 

Contribution of each corner atom to the unit cell =\frac{1}{8} .

 

Total number of atoms per unit cell ==8 \times \frac{1}{8}=1

 

Therefore, the correct answer is (c) 4, as there are 4 corner atoms in a cubic unit cell with atoms only at the corners.

 

Posted by

Devendra Khairwa

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