Q. A fcc unit cell of aluminium contains the equivalent of how many atoms?
A) 1
B) 2
C) 3
D) 4
Explanation
(d)
$\frac{1}{8} \times \ 8\$(at corners)$= 1$
$\frac{1}{2} \times \ 6$(at face center)$= \ 3$
$Z = 1 + 3 = 4$ (total number of atoms)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.