Which of the following types of bonding does not involve the formation of new substances?

Of the types of bonding listed, metallic, covalent, co-ordinate, and electrovalent, metallic bonding is the type of bonding that does not involve the formation of new substances. Metallic bonding occurs between metal atoms, where the outer electrons of each metal atom are delocalized and can move freely throughout the entire metallic crystal. These delocalized electrons are responsible for the characteristic properties of metals, such as high electrical conductivity and luster. However, metallic bonding does not involve the formation of new substances, as the metal atoms are simply held together in a lattice structure by the electrostatic attraction between the positive metal ions and the negatively charged delocalized electrons. In contrast, covalent, co-ordinate, and electrovalent bonding all involve the sharing or transfer of electrons between atoms to form new chemical substances.