Indicate the type of solid (molecular, metallic, ionic, or covalent-network) for each compound: 14 (a) CaCO3___________________________________ 14 (b) Pt ______________________________________ 14 (c) ZrO2 (melting point, 2677 °C)___________________________________ 14 (d) table sugar 1C12H22O112_____________________________________ 14 (e) benzene 1C6H62 ____________________________________________ 14 (f) I2__________________________________________________________

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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.