M = 93 u Using the formula
Number of atoms per unit cell: Face Centered Cubic Unit Cell
o
In a face-centered cubic( fcc) unit cell the atoms are present in the corners and at the center of all the faces of the cube. o
Each atom present at the face-center is shared between two adjacent unit cells and only a ½ of each atom belongs to a unit cell.
Thus, in a face-centered cubic( fcc) unit cell: 8 corners X 1 / 8 per corner atom = 8 * 1 / 8 = 1 atom