Predicting polarizability and polarizing power

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Corryn Doll
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Predicting polarizability and polarizing power

Postby Corryn Doll » Thu Jun 14, 2018 10:33 am

How would I go about predicting the polarizability of Anions and the polarizing power of Cations? Is there a periodic trend which can be used to predict such things, or another way?

Aryana Nazem 1A
Posts: 40
Joined: Fri Apr 06, 2018 11:04 am

Re: Predicting polarizability and polarizing power

Postby Aryana Nazem 1A » Thu Jun 14, 2018 11:18 am

Polarizability increases w atomic radius aka down a group bc their electron clouds can easily be distorted where as small highly charged cations have high polarizing power (decreases across a period)

Jordan Y4D
Posts: 25
Joined: Fri Sep 28, 2018 12:27 am

Re: Predicting polarizability and polarizing power

Postby Jordan Y4D » Sun Nov 04, 2018 1:02 pm

Polarizability goes inverse along with the electron affinity of elements. If an atom can be easily polarized, it can easily lose an electron, meaning it has a low electron affinity.

davidbakalov_lec2_2L
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Predicting polarizability and polarizing power

Postby davidbakalov_lec2_2L » Sun Nov 04, 2018 1:04 pm

Did he say that polarizability will be covered on the midterm?

angelagd3l
Posts: 32
Joined: Fri Sep 28, 2018 12:26 am

Re: Predicting polarizability and polarizing power

Postby angelagd3l » Sun Nov 04, 2018 1:06 pm

if it can easily lose an electron then there is a lower electron affinity

Chem_Mod
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Re: Predicting polarizability and polarizing power

Postby Chem_Mod » Sun Nov 04, 2018 1:38 pm

Polarizability essentially has to do with how much charge is there and how much space does the atom have to spread the charge out. For example, a large anion like Iodide is large and can spread the charge over its volume and become polarized. Polarizing ability increase with decreasing radius and increasing charge. So, a highly charged, small cation will have a highly localized charge which will affect negatively charged species strongly.


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