Ionic compounds form when 2 species have a large difference in electronegativities resulting in complete transfer of an/a electron(s) between 2 species, e.g. 2Na + Cl2 -> 2NaCl. read more
As single ions of a metal are not associated in the solid with single ions of a non metal, separate units of ionic compounds do not exist. It is, therefore, wrong to talk of a molecule of an ionic compound. read more
Basically a 'discrete molecule' is a covalent molecule in which the intermolecular forces are really weak, hence the low melting and boiling points of these molecules. The forces which act between these molecules are called Van Der Waals forces which is a intermolecular (between molecules) force. read more
Unlike metallic and ionic bonded compounds, covalent bonded compounds exist is devices called discrete molecules.Because the atoms inside the molecules do now not trade their relative function or bonding in the molecule in the course of heating or while dissolved, they may be gases or molecular solutes.A few molecular compounds will decompose or react with heating or with the solvent, but these are unique cases. read more