1.

Copper crystals have fcc unit cells: Compute the number of atoms per unit cell of copper crystal.

Answer»

Solution :In a fcc unit CELL, atoms are present at the eight corners and also at the six FACE CENTRES of the unit cell.
therefore number of CU atoms in a unit cell = `(frac{1}{8}xx8)+(frac{1}{2}xx6)=1+3=4`


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