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For a BCC crystal specimen, consider a unit cell:

(2) a. Construct the unit cell using the modeling clay provided and draw the unit cell below.
 
 
 
 
 
 
 
 
 
 
 
 

(2) b. Where do the atoms touch? (Use the unit cell as a reference)
 
 
 
 
 
 
 
 

(3) c. How is the size of the unit cell (the lattice constant) related to the atom size (the atom radius)?
 
 
 
 
 
 

For an FCC crystal specimen, consider a unit cell:

(2) d. Construct the unit cell using the modeling clay provided and draw the unit cell below.
 
 
 
 
 
 
 
 
 
 

(2) e. Where do the atoms touch? (Use the unit cell as a reference)
 
 
 
 
 
 

(3) f. How is the size of the unit cell (the lattice constant) related to the atom size (the atom radius)?