In this lecture Professor Goldwhite will walk you through Types of Solids, X-Ray Diffraction, and Unit Cells. First, X-Ray Diffraction will be discussed with its relation to both Crystalline Solids and Amorphous Solids. Next you will delve deeper into Crystalline Solids with investigations of Atomic, Ionic Crystal, Molecular Crystal, and Network Solids. X-Ray Diffraction will also be correlated with Bragg's Law. Then you will learn about Unit Cells, in particular, the Simple Cubic Unit Cell, Face-Centered Unit Cell, and the Body-Centered Unit Cell. The Unit Cell concept will then be applied to calculating the Densities of Crystalline Solids. Lastly, you will cover the First Law of Thermodynamics and Lattice Energy.
solids ordered: test is X-ray diffraction; fracture along planes
solids; not ordered; fracture along curves e.g. glass
of crystalline solid include metals; ionic crystals like NaCl;
molecular crystals like sucrose; network solids like diamond, quartz
Law gives structures from X-ray diffraction
cell represents symmetry of whole crystal by abstracting a small
cubic, face-centered cubic, and body-centered cubic unit cells;
learn how to draw each
cell contents and densities of materials; master connections between
atomic radii, unit cell dimensions, and density
Law of Thermo and formation of ionic crystals from elements, e.g.
energy and relationship to constitution of ionic crystals
Types of Solids, X-Ray Diffraction, Unit Cells
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
Chang’s best-selling textbook continues to take a traditional approach and is often considered a student and teacher favorite. The book features a straightforward, clear writing style and proven problem-solving strategies.