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SEP Develop a Model: The element argon (Ar) has eight valence electrons and is a liquid at very low temperatures. Sketch a model of two argon atoms and where each atom’s electrons need to be in order for an attractive dispersion force to occur. Make a similar sketch that explains why larger molecules typically experience larger dispersion forces.

Sagot :

Larger molecules experience larger dispersion forces due to more distance of valance of electrons from the nucleus.

Cause of stronger dispersion force

Larger atoms and molecules have stronger dispersion forces than smaller atoms and molecules because in a larger atom or molecule, the valence electrons are present farther from the nuclei than in a smaller molecule.

They are less tightly held to the nuclear charge present in the nucleus and can easily form temporary dipoles so we can conclude that larger molecules experience larger dispersion forces due to more distance of valance of electrons from the nucleus.

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