Page 1 of 1

Effect of size

Posted: Mon Jul 15, 2019 8:30 pm
by David Zhang 1B
Why does increasing the size or molar mass result in stronger attractive interactions?

Re: Effect of size  [ENDORSED]

Posted: Mon Jul 15, 2019 11:01 pm
by Jeril Joseph 1B
I believe this is due to the fact that with increasing molar mass and atomic size comes with an increase in electrons. With the increase in electrons, the atom has a higher interaction potential energy. Also, polarizability , which is the measure of the ability for anions to form dipoles or to be distorted in their electron clouds, needs to be considered since polarizability is proportional to interaction energy. Because larger atoms tend to have higher polarizability, those atoms will also have higher interaction energies. Hope this helps.

Re: Effect of size

Posted: Sun Jul 21, 2019 8:53 pm
by nicknavejas1B
This was very imformative thank you

Re: Effect of size

Posted: Tue Jul 23, 2019 7:47 pm
by Yilun Ding
This is because that increase the molecular mass will increase the number of electrons present in a molecule, its electron clouds will be more likely to be distorted(polariziability) which will lead to greater attraction.

Re: Effect of size

Posted: Tue Jul 30, 2019 2:27 pm
by Yasmin Olvera 1D
I think because Van der Waals forces depend on size. he bigger the size, the greater the force due to the electron clouds.

Re: Effect of size

Posted: Tue Jul 30, 2019 2:46 pm
by Jennifer Zhou 1A
I think the London forces gets higher when there are more electrons, since there is a bigger electron cloud to be induced

Re: Effect of size

Posted: Tue Jul 30, 2019 5:04 pm
by jlinwashington1B
so does this have anything to do with electronegativity?

Re: Effect of size

Posted: Tue Jul 30, 2019 10:06 pm
by Bella Martin
From my understanding, the larger the atom, the less electronegative it is because the electrons are farther away from the attractive force of the positive nucleus. Therefor, the nucleus isn't able to pull new electrons in with as much force as, say, Fluorine.