![]() Positively charged ions, such as Na(+), Li(+), and Ca(2+), are termed cations. Ionic are interactions between charged atoms or molecules (“ions”). Van der Waals Dispersion Forces (“London forces”).Van Der Waals Dipole-Dipole Interactions.Let’s look at them individually, from strongest to weakest. Ionic bonds > Hydrogen bonding > Van der Waals dipole-dipole interactions > Van der Waals dispersion forces. The four key intermolecular forces are as follows: ![]() With 10 examples of solved problems! (Also contains all the key points discussed in this post) Metallic bonds and dispersio force how to#Now available – Download this awesome (free) 3-page handout on how to solve common boiling point problems. There are four major classes of interactions between molecules and they are all different manifestations of “opposite charges attract”. ![]() It all flows from this general principle: as bonds become more polarized, the charges on the atoms become greater, which leads to greater intermolecular attractions, which leads to higher boiling points. (We call these intermolecular forces – forces between molecules, as opposed to intramolecular forces – forces within a molecule. ![]() Properties like melting and boiling points are a measure of how strong the attractive forces are between individual atoms or molecules. ![]()
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