CHE 116 Lecture Notes - Lecture 23: Intermetallic, Close-Packing Of Equal Spheres, Ionic Compound
19 Apr 2018
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Document Summary
Metallic solids share a pool of highly delocalized electrons. Ionic solids are sets of cations and anions mutually attracted to one another. Covalent-network solids are joined by an extensive network of covalent bonds. Molecular solids are individual molecules that are linked to one another only by van der waals forces. In crystalline solids, atoms are arranged in a very regular pattern. Amorphous solids are characterized by by a distinct lack of order in the arrangement of atoms. Unit cells are the individual repeating shapes of the lattice, and ll the entire space of the substance. The crystal lattice is the geometrical pattern of points on which the unit cells are arranged, de ned by lattice points. Within each of these major lattice types, additional types are generated by placing lattice points in the center or the faces of the unit cell.
