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non polar covalent electronegativity
.0-.4
polar covalent electronegativity
.5-1.8
ionic electronegativity
1.8+
polar molecules
unequal share, do not cancel
non polar molecules
equal electronegativity, must cancel out
dipole-dipole attractions
polar molecules
hydrogen bonds
strong, H bonds to O, F, or N
dispersion forces
nonpolar and weak
ionic bonds
metal + nonmetal
covalent bonds
nonmetal + nonmetal