How is polarity related to electronegativity?How is it affected by size of alkyl group?

How is polarity related to electronegativity?How is it affected by size of alkyl group?


1 Answers

878 Points
13 years ago

Dear student,

Electronegativity is a measure of how well an atom in a molecule will attract electrons from a bond. The higher an atom's electronegativity, the better it is at attracting electrons from a bond and the more time the electrons will want to spend on that atom.

To determine how polar a bond is, you need to look at the electronegativities of the two bonded atoms. The difference in electronegativity will indicate how polar the bond is:

If you have a large electronegativity difference then one atom (the one with the higher electronegativity) will attract the electrons from the bond more, so the electrons will spend a disproportionate amount of time on that atom giving it a partial negative charge and the atom it's bonded to a partial positive charge.

If you have a small electronegativity difference then neither atom will be able to draw the electrons away from the bond that well and so the bond will only be slightly polar or not polar at all if the electronegativities are the same.


Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..


Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

Think You Can Provide A Better Answer ?


Get your questions answered by the expert for free