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Polarity is what exactly?

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non_compus_mentis:
You know how you're all just dying to explain polarity to me... ? Haha. Please. From the start.

gregpawin:
http://www.chemicalforums.com/index.php?board=8;action=display;threadid=66

If you have more questions, please reply.

Bob Bobson:
This may be a dumb question, but is ozone polar?  As far as I know, it does not have polar bonds but I know oxygen is paramagnetic (has unpaired electrons) and thus attracted to a magnetic field.  Also, I know ozone has a bent 120 degree shape--which is usually polar.  Any insight?

jdurg:
I had always thought that polarity was caused by differing electronegativities of the atoms involved in a bond.  If you have two atoms of the same element bonded to each other, they both have the same electronegativity so they would have to be non-polar.  Is that correct?  

Corvettaholic:
Based on a some recent reading today, I'd say you're right Jdurg. The way I understand it, you need differing electronegativty to be polar, and if its a big difference... the bond is no longer covalent but ionic.

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