achieve week 5 hw question 17

[505766240]

Which molecules exhibit only London (dispersion) forces?

BF3

CH3F

NF3

Cl2

CH4

[Samuel Mushinski 2G]

London Dispersion Forces are forces that attract only non-polar molecules to each other. It is a very minute attraction, but still there. So because CH4 is the only non-polar molecule listed, it is the only one that would undergo London Dispersion Forces.

[SarahOMalley1D]

Hi! Just to add more background to the question, it asks for which molecules exhibit only London Dispersion Forces because all molecules technically exhibit London Dispersion Forces. Only, London Dispersion Forces are so weak that they are only discussed for nonpolar molecules and noble gases, which don't have other forms of attractive forces.

[Aneesha_Nema_3C]

Because London dispersion forces are such weak forces and don't have permanent dipoles (they're also known as induced dipole-induced dipole forces), the molecules that would ONLY contain these forces would have to be the nonpolar molecules.