Their properties are dominated by the effects of the delocalised boding which holds these structures together. Gem Stones Gem stones like diamond are composed of regular arrays of atoms connected by chemical bonds to form a giant, effectively continuous, molecules. Strong covalent bonds, extending in three dimensions, make these materials strong. The active ingredients of many medicines are small molecules. These medically active molecules seek out and act on specific molecular regions of living organisms.
Medicines can interrupt the life cycle of a bacterium or virus at the molecular level.
Medicines also allow the treatment of imbalances and undesirable processes, such as the production of cholesterol, to improve health.