(Polar molecules, Non-polar molecules, etc.)
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to determine if the bonds are polar or non-polar we just have to know if the two elements have the same electronegativity or not correct? And if they do have the same it's non-polar and if they're different it's polar?
It is also to consider the shape of the molecule. For example, polar bonds arising from differing electronegativities of central and bonded atoms may form on a molecule with a trigonal planar shape; however, this molecule will be nonpolar given the fact that electrons are evenly distributed about these bonded atoms.
I would say that when considering if a bond is polar or non-polar, I would compare the electronegativity of the two atoms as the more electronegative atom is more likely to pull the shared pair. Id also consider the shape of the molecule because polar bonds arising from differing electronegativities of bonded atoms may form a nonpolar shape due to the fact that electrons are evenly distributed about these bonded atoms.
The electronegativity of the two atoms doesn't necessary have to be the same. The bond can also be considered nonpolar if the values are extremely close to each other. An example is a bond C-H bond. Carbon and Hydrogen have different electronegativities, but the difference is so slight the bond is effectively nonpolar.
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