Chem 1C - Chapter 16
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12 Terms
Crystalline solid
highly ordered throughout
Amorphous solid
short-range order, long-range order
Ionic solids
brittle, high melting point
ex. NaCl
Molecular solids
held together by IMF’s
intermolecular vs intramolecular
Intermolecular forces are the attractions between molecules. Intramolecular forces are those within the molecule.
atomic solids
held together by covalent bonds, made entirely of one element, high melting point
metallic solids
metal cations are held together by delocalized electrons, good electrical conductors, strong but malleable, variable melting points
unit cell
smallest repeating unit of a lattice
corner postition
¼ atom
edge position
½ atom
interior position
1 atom
non-closest packed:
simple cubic, body-centered cubic
Note 
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