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普林斯顿AP化学第48页 Van der Waals Forces

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普林斯顿AP化学第48页 Van der Waals Forces
普林斯顿AP化学第48页 Van der Waals Forces里面讲Dipole-dipole forces occur between neutral,polar molecules.
London Dispersion Forces occur between neutral,nonpolar molecules.
为啥都有个neutral……求解!
普林斯顿AP化学第48页 Van der Waals Forces
I guess the broad meaning of molecule is used here:a molecule means a neutral (without net charge) molecule,or an ion (with positive or negative charge).For example,H+ is charged (not neutral),but it's also non-polar.However,if not specifically mentioned,this is never used.
More likely,the word "neutral" is just for emphasis (exluding ionic bond).