RA%20LO%20Lec%2026%20%28x-tals%29%20F090 - and a simple...

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Lecture 26 READINGS: Sections 13.1, 13.2 and 13.4. Understand These Concepts How packing of spheres gives rise to the hexagonal and cubic unit cells. Types of crystalline solids and how their intermolecular forces give rise to their properties. Describe the structure of a FCC metal, a BCC metal, and a simple cubic metal in terms of layers of atoms and the structures of CsCl, NaCl, ZnS, in terms of layers of ions and occupancy of holes in these layers. Describe the unit cell, position of the atoms in the unit cell, and coordination number for each atom in the cell of CsCl, NaCl, ZnS, a FCC metal, a BCC metal,
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Unformatted text preview: and a simple cubic metal. • How band theory accounts for the properties of metals, non-metals, and metalloids. • The definition of polymorphism Master These Skills • Find the number of particles in a unit cell • Calculate atomic radius from the density and crystal structure of an element. • Calculate the distance between any two ions in a cubic unit cell given the location of the atoms and the dimensions of the cell. • Calculate the ionic radius of an ion given the size of the counter ion and the information in the previous bullet point....
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