01:160:161 Study Guide - Midterm Guide: Valence And Conduction Bands, Metal, Ionic Radius
Document Summary
Sio2(silica or quartz) can make quartz crystal or quartz sand (makes glass) Glass: transparent fusion product of inorganic materials that cooled to a rigid state w/o crystallizing. Unit c: smallest part of a lattice that can be repeated to construct the full lattice. In a 3d repeating pattern = crystal/crystalline lattice. Angles + edges are characteristic/constant of the substance. Primitive cubic: structural particles centered only at corners (d= 8 x 1/8 = 1) Body-centered cubic (bcc): 1 additional structural particle at center of cube (d=8 x 1/8 + 1=2) Face-centered cubic (fcc): additional structural particle at center of each face; no particle in center of cube (d=8 x 1/8 + 6 x = 4) Density of a solid depends on number of atoms per unit c. Corner atoms don"t touch each other in bcc or fcc; each corner atom in bcc touches only the center atom; each corner atom in fcc touches center atom and face atoms.
