Question

Copper adopts fcc structure with edge length of unit cell equal to 0.361 nm. The value of $r_{metallic}$ :-

• A. 0.128 nm
  
• B. 0.091 nm
  
• C. 0.180 nm
  
• D. 0.64 nm

Answer 1

The correct option is A 0.128 nm


In fcc structure:-
$r_{metallic}=\frac{\sqrt{2}\times \text{Edge length}}{4}=\frac{\sqrt{2}\times 0.361}{4}=0.128nm$.