Polar/Nonpolar Bonds/Molecules

(Polar molecules, Non-polar molecules, etc.)

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Ashley Lopez 3J
Posts: 65
Joined: Wed Sep 30, 2020 10:06 pm

Polar/Nonpolar Bonds/Molecules

Postby Ashley Lopez 3J » Sun Nov 29, 2020 10:19 pm

What is the difference between polar/nonpolar bonds and polar/nonpolar molecules?

Bella Bursulaya 3G
Posts: 108
Joined: Wed Sep 30, 2020 9:54 pm

Re: Polar/Nonpolar Bonds/Molecules

Postby Bella Bursulaya 3G » Sun Nov 29, 2020 10:21 pm

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!

Katherine_Douglas_1F
Posts: 53
Joined: Wed Sep 30, 2020 10:01 pm

Re: Polar/Nonpolar Bonds/Molecules

Postby Katherine_Douglas_1F » Sun Nov 29, 2020 10:42 pm

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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