How many $NaCl$ units are present in one unit cell of $NaCl$?

An alloy of copper,silver,and gold is found to have copper atoms in an $fcc$ lattice. If silver atoms occupy the edge centers and gold atoms are present at the body center,what is the formula of the alloy?

Which of the following expressions is correct in the case of a $CsCl$ unit cell (edge length '$a$')?

What is the coordination number of a particle in $fcc$ structure?

Explain the calculation of the number of atoms in a primitive cubic unit cell.

In a face-centered cubic $(FCC)$ unit cell,what fraction of an atom located at the face center is shared by one unit cell?