Polar vs. Nonpolar in Chemistry?

Okay, I studied chemistry. We have the electron pair geometry that describes a molecule w/o the lone pairs (valence e-) as Linear (2 atoms), Trigonal Planar (3 atoms), Tetrahedral (4 atoms), Trigonal Bipyramidal (5 atoms) and Octahedral (6 atoms). Then we have molecular geometries sub category of each. Linear is linear and is NP. Now, if we have a central atom and the terminal atoms are different elements w/ different electronegativities, it will have a dipole moment (one atom is more positive or negative than the other and makes the entire molecule more negative or positive) and be polar. Trig planar has a trig planar and is NP (3 atoms in a triangle). Then bent has one of these atoms as a lone pair. The list goes on. This lone pair is spatially more diffuse as opposed to the normal bonding pairs that are attracted to two atomic cores and pushes them aside from the normal bond angle expected. More e- are concentrated with the bonding pairs and create a dipole moment. I studied General Chemistry w/ Ebbing and Gammon 8th ed. Check out website if still up and working! CHEM IS HARD. Good luck!