unit 3 quiz Flashcards
london dispersion
for all molecules
dipole dipole
polar molecules
asymmetrical molecules w/ only nonmetals
includes hydrogen bonding
hydrogen bonding
strong type of dipole dipole
hydrogen itself has to bond with either F O N
strong but difficult to compare IMF
ionic and metallic
ionic
metals w nonmetal
metallic
only metals
covalent network
strongest IMF
dipole induced dipole
one substance polar and the other is non polar
the IMF increases w magnitude of dipole of polar molecule and with polarizabiity of nonpolar molecule
ion induced dipole
nonpolar substance w ion
strength increases w larger charged ions(smaller radius) and more polarizable molecules
ion dipole
polar substance w ion
stronger than dipole dipole
strength increases w large charged ions(smaller size) and more polar molecules
what properties increase with IMF
boiling/melting/freezing pt enthalpy of fusion/vaporization viscosity surface tension lattice energy
what properties decrease with IMF
vapor pressure
solubility(depends on polarity of solvent and solute)
what are the 4 basic types of solids
ionic solids
covalent networks of solids
molecular solids
metallic solids
due to strong interactions between ions
ionic solids have high vapor pressure high melting pts and high boiling pts
electrostatic attraction
attraction between positive and negative ions
why are ionic solids brittle
due to repulsion of like charges when one layer of solids slides across the other layer
when do ionic solids conduct electricity
(when charged which is a given)
web ions are mobile
when ionic solid is melted
or dissolved in water or another solvent
covalent networks have atoms at their lattice pts with
strong directional covalent bonds
covalent solids are only formed of
nonmetal
how are covalent solids characterized
hardness
strength
high melting point