The slideshow shows how a covalent bond forms between a hydrogen atom and a chlorine atom, making hydrogen chloride. A simple molecule contains only a few atoms, so the sizes of atoms and simple ...

Through a simple sonochemical method ... More information: Asmaa Jrad et al, Cationic covalent organic framework for the fluorescent sensing and cooperative adsorption of perfluorooctanoic ...

They too are held together by very strong covalent bonds. There are greater intermolecular forces between the long chains compared with smaller simple molecules. This means that polymers have a ...