Intermolecular Bonds

Today we studied two different types of bonds.

Intramolecular              and                        Intermolecular

Intramolecular Bonds exist inside molecules, for example Ionic and Covalent bonds.

Intermolecular Bonds exist between molecules and there are three different types.

1. London Dispersion Forces

These are the weakest intermolecular bonds. These happen in almost every molecule and are caused by the random movements of electrons inside atoms. Sometimes a large of electrons congregates on one side of an atom, causing a temporary dipole.




London Dispersion Forces at work......


2. Dipole-Dipole Bonds

These exist only in polar molecules, where the negative and positive ends of molecules are attracted to the negative and positive ends of other molecules. These are stronger than London Dispersion Forces but weaker than Hydrogen Bonds.




A Polar Molecule


3. Hydrogen Bonds

When Hydrogen bonds with certain elements( Oxygen, Fluorine, Nitrogen, and in some cases Chlorine). Hydrogen Bonds are very strong.




A Hydrogen Bond



We can measure how high or low the melting and boiling points of elements will be based on their bonds.


Thats all for today Celtics!!!



haha