First of all, it must be noted that all bonds between two non-metals do not fall under the category of covalent bonds; there are also other bonds, one of which is a hydrogen bond. By definition, a covalent bond is a form of a chemical bond that occurs due to the sharing of electron pairs between the same or distinct atoms. read more
Covalent bonds are the bonds between the atoms within the same water molecule. Hydrogen bonds are the bonds between two water molecules. All molecules have covalent bonds, but only some molecules have hydrogen bonds. As an example, water has hydrogen bonds, but carbon dioxide does not. read more
Hydrogen bonds are intermolecular forces; covalent and ionic bonds are intramolecular forces.Ionic Bonds Ionic bonds form when one atom transfers electrons to another atom. The atom that loses an electron becomes a positive ion. read more