Increasing polarization

Moderators: Chem_Mod, Chem_Admin

504594108
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Increasing polarization

Postby 504594108 » Wed Oct 21, 2015 1:45 pm

For problem 3.83 why does N^3- have more polarizability than 0^2-?

Melissa Ikeda 1K
Posts: 8
Joined: Fri Sep 25, 2015 3:00 am

Re: Increasing polarization

Postby Melissa Ikeda 1K » Wed Oct 21, 2015 2:05 pm

N^3- and O^2- have the same number of electrons, but O has more protons, so it has a stronger pull on it's electrons. N^3- would have a larger ionic radii because it's electrons experience less of a pull, so they have more polarizability.

Colin Hayashi 1K
Posts: 11
Joined: Wed Sep 21, 2016 2:55 pm

Re: Increasing polarization

Postby Colin Hayashi 1K » Wed Oct 19, 2016 9:53 pm

N^3- would have a larger ionic radii because it's electrons experience less of a pull, so they have more polarizability.


To expand on what the above quote is saying, the lessened pull is a result of lessened electrostatic coulombic force by the N^3- due to the above mentioned lessened effective nuclear charge in comparison to an O atom. The polarization is the effect of the distortion of the electron cloud as the increase in cloud size relates to it's increased ability to be attracted to the positive nucleus of a surrounding cation.

Alexandria Weinberger
Posts: 51
Joined: Fri Sep 29, 2017 7:03 am

Re: Increasing polarization

Postby Alexandria Weinberger » Fri Nov 03, 2017 12:36 pm

O^2- has more protons than N^3-, making the effective nuclear charge of the oxygen anion greater than the nitrogen anion. This will have more of a pull on electrons. This greater effective nuclear charge will also be able to resist distortion or its electron cloud more, meaning that it won't be able to be polarized as easily (less polarizability).


Return to “Polarisability of Anions, The Polarizing Power of Cations”

Who is online

Users browsing this forum: No registered users and 3 guests