Question

Nickel crystallizes as fcc. How many unit ce"s are required to accommodate one mole of nickek​

Answer 1

Answer:

The first thing we have to do is find the number of atoms per face centered cubic nickel cell. It has 8 atoms, one at each corner, and since it shared with 7 other corners, this unit cell will have 1/8 of 8, giving us 1 total atom per unit cell. There are 6 faces on the cube and each face is shared with one other face, giving a value of 1/2 atom per face, and therefore 3 total atoms for our nickel unit cell (1/2 x 6=3). So adding 1+3 we get 4 atoms per unit cell for this nickel Crystal