2046chapter12

2046chapter12 - compounds. Classifications of Solids...

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1 Ch 12: Solids and Modern Materials Learning goals and key skills: h Classify solids base on bonding/intermolecular forces and understand how difference in bonding relates to physical properties h Know the difference between crystalline and amorphous solids. Understand the relationships between lattice vectors and unit cell. h Understand why there are a limited number of lattices. Be able to recognize the four 2d and several 3d primitive lattices. Know the locations of lattice points for body- and face-centered lattices h Calculate the empirical formula and density of ionic and metallic solids from a picture of the unit cell. Be able to estimate the length of a cubic unit cell from the radii of the atoms/ions present h Explain how homogeneous and heterogeneous alloys differ. Describe the differences between substitutional alloys, interstitial alloys, and intermetallic
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Unformatted text preview: compounds. Classifications of Solids Crystalline Solids have atoms arranged in an orderly repeating pattern Amorphous Solids lack the order found in crystalline solids 2 Unit cell relatively small repeating unit that is made up of a unique arrangement of atoms and embodies the structure of the solid. Crystal lattice geometrical pattern of points on which the unit cells are arranged Lattice points each lattice point has an identical environment. The positions of the lattice points are defined by the lattice vectors . 3 4 X-ray diffraction 5 6 Alloys Alloy a material that contains more than one element and has the characteristic properties of a metal. 7...
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2046chapter12 - compounds. Classifications of Solids...

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