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20 Cards in this Set
- Front
- Back
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Dispersion Force
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weak forces resulting from density shifts in electrons in the electron cloud
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Dipole-Dipole Force
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attraction between oppositely charged regions of polar molecules
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Hydrogen Bond
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dipole-dipole attraction occurring between a hydrogen atom and an electronegative atom
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Viscosity
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measure of resistance of a liquid to flow
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Surface Tension
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the amount of energy required to increase surface area
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Surfacants
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compound that lowers the surface tension of water
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Crystalline Solid
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a solid whose atoms, ions, or molecules are arranged geometrically
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Unit Cell
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the smallest arrangement of atoms in a crystal lattice that is symmetric with the whole crystal
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Allotrope
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an element that exists in different forms in the same state
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Amorphous Solid
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particles of a solid are not arranged in a repeating pattern
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Melting Point
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temperature at which the forces holding a crystal lattice together are broken
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Vaporization
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liquid changes to a vapor or gas
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Evaporization
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vaporization only occurs at the surface of a liquid
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Vapor Pressure
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pressure exerted by a vapor over a liquid
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Boiling Point
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Temperature the vapor pressure of a liquid equals the air pressure
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Freezing Point
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temperature a liquid is converted into a crystalline solid
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Condensation
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gas or vapor is changed into a liquid
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Deposition
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substances changed from a gas to a solid without becoming a liquid
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Phase Diagram
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graph of pressure versus temperature that shows the phase of an element
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Triple Point
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point that represents the temperature and pressure of all 3 phases
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