Consider a unit cell for a lead nitrate compound (below). The red-and-blue Y-shaped structures are nitrate anions. The dark spheres are lead ions 1. What type of cubic unit cell does the compound have? Explain how you know. 2. Based on the unit cell, what is the formula of lead nitrate? Show your work or reasoning.

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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.