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Covalent bonds happen between non-metals and are fairly weak
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The Metallic bonds are a bond between the same type of atom.
The INTERmolecular creates an attraction between molecules, this is the weaker of the two. INTERmolecular forces come in four different types: Ionic, Dispersion, Hydrogen Bonds, and Dipole-Dipole Forces. Ionic forces in a molecule are like the forces that hold a atom together, they only happen between a metal and a non-metal. Dispersion the the weakest force because it temporary. The bond can only take place between Non-Metal Molecules. When molecules are attracted together by dispersion an electron cloud forms at one end of the molecule making it slightly negative, while the molecule next to it becomes slightly positive on one end so they don't repel from each other.
Dipole-Dipole Forces are permanent and the second strongest compared to Hydrogen Bonds. They only happen between polar molecules which means the the molecule as a whole is not symmetric. They also arrange themselves so the slightly negative end of the molecule is attracted to the slightly positive end of the other molecule
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