An element crystallizes in a face-centered cubic lattice and has a density of 1.456 g/cubic cm. The edge of its unit cell is 4.52 x 10-8 cm. How many atoms are there in each unit cell? a. 4 b. 1 c. 2 a. 6

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.