States of Matter (3)

States of Matter (3) - Solids Crystalline Solids...

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Solids Crystalline Solids – well-ordered matter within the solid Amorphous solids – don’t have extensive ordering of particles. arrangement of atoms in the solid repeats itself Unit Cell - smallest unit of solid from which entire pattern can be made. - arrangement of constituents of the solid repeats itself: Crystalline Solids: studied by X-ray crystallography
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C. face-centered cubic Efficiency: 74% B. body-centered cubic Efficiency: 68% A. simple cubic Efficiency: 52% Cubic unit cells Coordination number: Coordination number: Coordination number: Atoms/unit cell: Atoms/unit cell: Atoms/unit cell: r r 2r (4r) 2 = C 2 = A 2 + B 2 = 2 A 2 2r = A (4r) 2 = D 2 = A 2 + B 2 + E 2 = 3 A 2 r r E r simple cubic body-centered cubic face-centered cubic
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Types and Properties of Crystalline Solids Molecular Solids Covalent Network Solids Ionic Solids Metallic Solids Molecular Solids : molecules held together by intermolecular forces, relatively low melting points. Covalent Network Solids
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States of Matter (3) - Solids Crystalline Solids...

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