Electronegativity relationship with Polarizability

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Sana_Mian_3G
Posts: 30
Joined: Fri Sep 28, 2018 12:23 am

Electronegativity relationship with Polarizability

Postby Sana_Mian_3G » Fri Nov 09, 2018 10:40 am

What is the relationship with the electronegativity and polarizability? Also, could someone write the definition of them so I have a better understanding.

Duby3L
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Electronegativity relationship with Polarizability

Postby Duby3L » Fri Nov 09, 2018 10:51 am

So, for electronegativity anions with a higher electronegativity have a weaker effective nuclear charge due to the addition of shells and because those anions such as Iodine that are far away from the charge of the nucleus its much easier for them to become distorted by cations. The higher the electronegativity the greater the polarizability because the anions could easily be distorted or messed with by the cations.

Yiwen Chen-3G
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

Re: Electronegativity relationship with Polarizability

Postby Yiwen Chen-3G » Fri Nov 09, 2018 11:03 am

I think electronegativity is the ability of drawing the shared electrons towards itself. Polarizability is the ability to form instant dipoles.
Electonegativity increase across a row and decrease down a group. This is because, in the same row, the right atoms need more electrons to achieve the most stable state. Down a group, the layers of electrons increases, so the attraction between the nucleus and the electrons becomes weaker.
Polarizability decreases across a period and increases down a group. This is because the more loosely the electrons are in the orbitals, the larger polarizability. Down a group, the atom becomes larger so there are more volume(orbitals) the electrons can occupy. Therefore the polarizability increases down a group.
Electronegativity depends on the number of valence electrons, while polarizability depends on the volume occupied by electrons (depends on the size of the atom and number of electrons).

ran2000
Posts: 66
Joined: Fri Sep 28, 2018 12:15 am

Re: Electronegativity relationship with Polarizability

Postby ran2000 » Sat Nov 10, 2018 8:11 pm

Electronegativity is the tendency of an atom of an element to attract electrons towards itself when bonded.
Polarizability is the tendency to be polarized (electrons can be 'distorted' by other atoms)
Generally substances with high electronegativity has a tendency to be less polarized (since the electrons are more strongly held)


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