Polarizing Power and Polarizability

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chrisdinkel_4E
Posts: 33
Joined: Fri Sep 28, 2018 12:17 am

Polarizing Power and Polarizability

Postby chrisdinkel_4E » Sun Dec 09, 2018 1:14 am

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??

alanaarchbold
Posts: 68
Joined: Fri Sep 28, 2018 12:27 am

Re: Polarizing Power and Polarizability

Postby alanaarchbold » Sun Dec 09, 2018 1:32 am

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.

josephperez_2C
Posts: 70
Joined: Wed Nov 15, 2017 3:04 am

Re: Polarizing Power and Polarizability

Postby josephperez_2C » Sun Dec 09, 2018 1:35 am

Li+ is the smallest cation and also has one less shell than Mg2+


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