👉 Polyatomicity is a property of atoms or molecules that requires three or more atomic nuclei, forming a single whole. This means that each atom has four electrons orbiting around it, with no lone pairs present. Polyatomic compounds are those where all atoms share electrons, making up the entire molecule. Examples of polyatomic compounds include water (H2O), which is composed of two hydrogen atoms and one oxygen atom, and carbon dioxide (CO2), which consists of two carbon atoms and one oxygen