Which type of bond would be formed in substances with very different electronegativities?

In substances with very different electronegativities, an ionic bond is formed due to the significant difference in the ability of the atoms to attract electrons. When one atom has a much higher electronegativity compared to another, it tends to grab electrons away from the less electronegative atom. This transfer of electrons results in the formation of charged ions: the atom that loses electrons becomes a positively charged cation, while the one that gains electrons becomes a negatively charged anion.

The strong electrostatic attraction between these opposite charges leads to the formation of an ionic bond. Ionic bonds are typically found between metals and nonmetals, such as sodium chloride (table salt), where sodium (with low electronegativity) transfers an electron to chlorine (with high electronegativity).

In contrast, polar covalent bonds occur when two atoms with different electronegativities share electrons unequally, but not to the extent that they form ions. Metallic bonds involve a sea of delocalized electrons shared among a lattice of metal atoms, whereas hydrogen bonds are a specific type of weak interaction between molecules that contain hydrogen bonded to highly electronegative atoms, like oxygen or nitrogen. Therefore, when considering very different electronegativities, the formation