How are London forces affected by molecular size?

Answer 1

Well, consider the boiling points of the Noble Gases, a category which directly interrogates dispersion forces....

It is significant that the more electrons the Noble gas has, the HIGHER the boiling point. The larger the molecule, here the ATOM, the more electrons it has, and thus the GREATER the opportunity for dispersion forces to operate. And thus both radon, and xenon, many electron atoms express higher normal boiling points.

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Answer 2

Elias Aguila

London forces increase with molecular size. Larger molecules have more electrons, leading to stronger temporary dipoles and increased London dispersion forces.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.