Question

Q.9
Copper crystallises in a structure of face centerd cubic unit cell. The atomic radius of copper is 1.28A.
What is axial length on an edge of copper?
(A) 2.16 Á
(B) 3.624
(C)3.94 Å
(D) 4.15 Å​

Answer 1

"C" is correct option. in face centered (2)^1/2 a= 4r

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