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Postby AlyssaYeh_1B » Sat Nov 09, 2019 2:14 pm

Why does the polarisability of molecules increase with size?

Trinity Vu 1D
Posts: 53
Joined: Fri Aug 30, 2019 12:15 am

Re: Polarisability

Postby Trinity Vu 1D » Sat Nov 09, 2019 2:35 pm

Polarizability increases the molecule size increases because this means that the electron shells increase and therefore the size of the electron cloud increases. The valence electrons get further away from the nucleus and experience weaker effective nuclear charge thus making them more easily distorted (polarizable).

Siya Shah 1J
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Joined: Sat Aug 17, 2019 12:15 am

Re: Polarisability

Postby Siya Shah 1J » Sat Nov 09, 2019 3:37 pm

Larger molecules have more electron repulsion and larger electron clouds and are therefore more prone to distortion than smaller molecules.

Nick Fiorentino 1E
Posts: 86
Joined: Wed Sep 18, 2019 12:16 am

Re: Polarisability

Postby Nick Fiorentino 1E » Sat Nov 09, 2019 6:25 pm

Larger molecules are more polarizable because the electrons in the outer shell are easier to take away. This is because they are "shielded" from the nucleus by the other electrons so they can be taken away from the atom easier.

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