Question

Answer the following for a face centered unit cell.
how do i find:
-# atoms / 1 unit cell
-coordination #

Answer 1

r u a teacher??

Answer 2

There are four (4) atoms/unit cell for fcc. That's done this way.
There are 8 corners of the cube shared by 8 other cells; therefore, 8 x 1/8 = 1 atom/unit cell.
Then each face has 1 atom in the center and there are 6 faces. Each face is shared by another cell; therefore, 6/2 = 3 atom/unit cell.
The total is 3 + 1 = 4.