(Polar molecules, Non-polar molecules, etc.)
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Polar bonds are bonds in which the electrons are not shared evenly. Such as in C-H, C will pull the electron from H more strongly than H pulls the electron from C, so C will have a partial negative charge and H will have a partial positive charge. A nonpolar molecule can have polar bonds, because if those bonds cancel out, the molecule will be nonpolar. If all the bonds are CH, such as CH4 (methane), all the polar bonds are facing equal but opposite directions, so they cancel out and the molecule overall is nonpolar. Hope this helps!
Almost every bond is a polar bond. The only exceptions are if the two atoms are the same/have the same electronegativity. A polar molecule is formed when the polar bonds do not cancel out. If you have 2 polar bonds with the same atoms on either side of a central atom, they will cancel out and the molecule will be non-polar. If there is a third atom in another plane or a different kind of atom (resulting in a diff level of polarity in the bond), they will not cancel out and the molecule will be polar.
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