Cesium chloride forms a sc lattice of chloride ions. How many cation atoms are in the lattice? How many anions are in one unit cell? Solid methane forms a fcc lattice. How many molecules of methane are in one unit cell? Zinc cyanide forms a bec lattice of zinc ions. How many cations are in one unit cell? How many anions are in one unit cell? Identify and describe the two NEW types of molecular forces for a compound in water