polar vs. non polar molecules. covalent/molecular compounds all molecular compounds are either polar...
TRANSCRIPT
Bond PolarityA bond is polar if it has a dipole moment.
Bond Dipole Moment: The electrons in a covalent bond connecting two different atoms are not equally shared by the atoms due to the electronegativity difference between the two elements.
If F, O, N, or Cl is bonded to a nonmetal other than itself, then the bond has a dipole
*** N Cl = no dipole
F ON C
Polar
Nonpolar
Al
Cl
Nonpolar MoleculesMolecules without positive and negative
sides (dipole)
Symmetrical or the same on their exterior
Causes of Polarity
1. Asymmetrical shapeTrigonal pyramidalBent
2. Unshared e- on the central atom
3. Polar bonds (see slide 5)
Shapes
Polar/Nonpolar
Tetrahedral
Linear
Trigonal Planar
Depends on Symmetry
Always Polar
Bent
Pyramidal
Always asymmetrical