Differences in electronegativity

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005199750
Posts: 32
Joined: Fri Sep 28, 2018 12:27 am

Differences in electronegativity

Postby 005199750 » Fri Dec 07, 2018 8:56 pm

Hey everyone. I was taking notes during one of the review sessions today, and I made the following note: "dipole moments occur when you have differences in electronegativity between _____." I never heard what the UA said after that, so I was wondering if anyone could help me fill in the rest of this sentence (and expand on the concept a little). Thanks so much!

Keshav Bhatnagar 1H
Posts: 32
Joined: Fri Sep 28, 2018 12:17 am

Re: Differences in electronegativity

Postby Keshav Bhatnagar 1H » Fri Dec 07, 2018 9:00 pm

Between two atoms. For ex. in Li-F, F is very electronegative thus the electrons in Li are pulled heavily towards the F resulting in a dipole (positive charge on Li and negative carge on F).

Joaquin Andrade
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: Differences in electronegativity

Postby Joaquin Andrade » Fri Dec 07, 2018 10:49 pm

Note also that difference in electronegativity could make an entire molecule polar. For instance, NH3 (Ammonia) is polar while CH4 is not due to the contrast in electronegativity differences in the respective molecules.


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