phy sci
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10 Terms
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Boiling point
temperature at which the vapor pressure and atmospheric pressure of a liquid substance are equal.
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Melting point
temperature at which solid becomes liquid.
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Surface tension
refers to the energy required to increase the surface area by a unit amount.
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Viscosity
resistance of the liquid to flow
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Vapor pressure
pressure exerted by a substance in its gaseous state.
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Volatility
measures the rate at which a substance vaporizes (changes from liquid to gas)
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Electron Configurations
element describes how electrons are distributed in its atomic orbitals
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Nonpolar molecules
form when there is equal sharing of electrons (Covalent bond). No dipole is formed
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Polar molecules
ccur when there is a transfer of electron (Ionic bond). A dipole forms, with part of the molecule carrying a slight positive charge
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Electronegativity (EN)
measures the relative tendency of an atom to attract electrons to itself when chemically combined with other atom.