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Postby 204929947 » Sun May 20, 2018 9:49 pm

So, Dr.Lavelle said that an element is highly polarizable if the electrons are highly distorted, does this make the ionic bond more or less with a covalent character? I remember him mentioning something about ionic bonds with covalent character... can someone explain how ionic and covalent bonds are related.

Nimrat Brar 1E
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Re: Polarization

Postby Nimrat Brar 1E » Sun May 20, 2018 9:55 pm

I also had a similar question and am just slightly confused over the concept of an ionic bond with a covalent character so if someone could explain that, it would be very helpful!

fara valdez
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Joined: Fri Apr 06, 2018 11:05 am

Re: Polarization

Postby fara valdez » Sun May 20, 2018 10:23 pm

I'm not that sure either, but I hope this helps!
https://www.askiitians.com/iit-jee-chem ... character/

Alicia Beebe
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Joined: Fri Apr 06, 2018 11:01 am

Re: Polarization

Postby Alicia Beebe » Sun May 20, 2018 10:30 pm

What I understood was that an element with higher electronegativity pulls the shared electron unequally. Highly distorted electrons are highly polarizable, which results in more covalent character. More covalent character also comes from ions causing distortion having high polarizing character. What I understood about the relationship is that all ionic bonds have SOME covalent character. The example from class was that in NaCl the Na+ exerts attraction on the electrons surrounding Cl-, which is an example of some covalent character. The larger the difference in electronegativity, the less covalent the character because one will pull on the electrons much more than the other, and they will be shared less and less. Hope this helps!

Vivian Gonzalez 1A
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Re: Polarization

Postby Vivian Gonzalez 1A » Sun May 20, 2018 10:37 pm

I also had a similar question and Alicia your response really cleared things up on covalent character. Thank you

Isobel Tweedt 1E
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Re: Polarization

Postby Isobel Tweedt 1E » Sun May 20, 2018 10:39 pm

I'm still confused too, but it helps to see how covalently bonded atoms can become ionicly bonded cations or anions. Here's a helpful website:

https://www.diffen.com/difference/Coval ... onic_Bonds

Nicole Shak 1L
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Joined: Wed Nov 22, 2017 3:03 am

Re: Polarization

Postby Nicole Shak 1L » Mon May 21, 2018 8:39 pm

3.81 Arrange the cations Rb+, Be2+, and Sr2+ in order of increasing polarizing power. Give an explanation of your arrangement.
3.83 Arrange the anions Cl-, Br-, N3-, and O2- in order of increasing polarizability and give reasons for your decisions.

So for this problem, can you say that polarizing power is greater with smaller cations and larger anions?

Allen Chen 1J
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Joined: Wed Nov 15, 2017 3:04 am

Re: Polarization

Postby Allen Chen 1J » Fri May 25, 2018 1:51 am

I believe, the larger a cation/anion is the more polarizable it is, and the less polarizing power it has

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