Solid State Question 156

Question: An $ fcc $ unit cell of aluminum contains the equivalent of how many atoms

[DCE 2003]

Options:

A) 1

B) 2

C) 3

D) 4

Show Answer

Answer:

Correct Answer: D

Solution:

$ \frac{1}{8}\times 8 $ (at corners) $ =1 $

$ \frac{1}{2}\times 6 $ (at face centre) $ =3 $

$ Z=1+3=4 $ (total no. of atoms)