Atom size vs. boiling point

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Quynh Vo
Posts: 45
Joined: Sun Sep 29, 2019 12:15 am

Atom size vs. boiling point

Postby Quynh Vo » Thu Nov 14, 2019 7:03 pm

How does the atomic radius of an atom correlate to its boiling point/melting point?

Kavya Immadisetty 2B
Posts: 106
Joined: Sat Aug 24, 2019 12:17 am
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Re: Atom size vs. boiling point

Postby Kavya Immadisetty 2B » Thu Nov 14, 2019 7:07 pm

A bigger atomic radii increases the polarizability of the molecule which increases the amount of induced dipole- induced dipole forces in a body of that molecule. More intermolecular forces will lead to a higher boiling point. In short, bigger atomic size leads to a higher boiling point.

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: Atom size vs. boiling point

Postby Justin Quan 4I » Fri Nov 15, 2019 12:40 pm

To add on, a bigger atomic radii would mean they have more electrons and more opportunities to create dipole-dipole forces. The larger the atomic radii basically means larger atomic size, which would therefore create more London-dispersion forces. Since bigger atomic size means stronger intermolecular forces, the boiling point must be higher as well.

Shivam Rana 1D
Posts: 106
Joined: Fri Aug 09, 2019 12:16 am

Re: Atom size vs. boiling point

Postby Shivam Rana 1D » Fri Nov 15, 2019 1:19 pm

Larger molecules and atoms are also more massive, and therefore, it takes more energy to make that substance change states.

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: Atom size vs. boiling point

Postby Rory Simpson 2F » Fri Nov 15, 2019 1:39 pm

The strength of the Van Der Waal's forces in the atom increases because of the greater number of electrons, which would increase the polarizability and thus the strength of IMFs.


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