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Predicting polarizability and polarizing power

Posted: Thu Jun 14, 2018 10:33 am
by Corryn Doll
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?

Re: Predicting polarizability and polarizing power

Posted: Thu Jun 14, 2018 11:18 am
by Aryana Nazem 1A
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)

Re: Predicting polarizability and polarizing power

Posted: Sun Nov 04, 2018 1:02 pm
by Jordan Y4D
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.

Re: Predicting polarizability and polarizing power

Posted: Sun Nov 04, 2018 1:04 pm
by davidbakalov_lec2_2L
Did he say that polarizability will be covered on the midterm?

Re: Predicting polarizability and polarizing power

Posted: Sun Nov 04, 2018 1:06 pm
by angelagd3l
if it can easily lose an electron then there is a lower electron affinity

Re: Predicting polarizability and polarizing power

Posted: Sun Nov 04, 2018 1:38 pm
by Chem_Mod
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.