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Polarizing Power and Polarizability

Posted: Sun Dec 09, 2018 1:14 am
by chrisdinkel_4E
why does Li+ have more polarizing power than Mg^2+ even though Mg^2+ has a stronger positive charge?
Why is Br- more polarizable than P^3- for the same logic??

Re: Polarizing Power and Polarizability

Posted: Sun Dec 09, 2018 1:32 am
by alanaarchbold
I know that stronger polarizability has to do with size, so the larger the molecule, the stronger the polarizability. Since Mg2+ has lost two electrons, it'll be smaller than Li+ because that only lost one electron. And then since Br is further down on the periodic table it's larger than P, so it's more polarizable.

Re: Polarizing Power and Polarizability

Posted: Sun Dec 09, 2018 1:35 am
by josephperez_2C
Li+ is the smallest cation and also has one less shell than Mg2+