Question

14. Gold (atomic radius =0.144nm) crystallizes in a face-centered unit cell. 3m a. What is the length of a side of the cell

Answer 1

Solution:

Given that

Radius of atom R= 0.144 nm

For a face–centered unit cell

Edge a = 2√2 R

Plug the values we get  

Edge a= 0.144 x 2 x 1,414 nm

Edge a= 0.407 nm

Solution: :– The length of a side of the cell = 0.407 n