Jan 23, 2020 · Ionic Bonds . In an ionic bond, one atom essentially donates an electron to stabilize the other atom. In other words, the electron spends most of its time close to the bonded atom. Atoms that participate in an ionic bond have different electronegativity values from each other. A polar bond is formed by the attraction between oppositely-charged ... When there is transfer of electrons between two atoms then it results in the formation of ionic bonds. Ionic bonds have opposite charges on its atoms and are strongly held by attractive forces. Therefore, polarity is induced in ionic compounds also due to difference in electronegativity of the two atoms. The elements in Na 2 O are a metal and a nonmetal, which form ionic bonds. Because sodium is a metal and we recognize the formula for the phosphate ion (see Table 3.1 "Some Polyatomic Ions"), we know that this compound is ionic. However, polyatomic ions are held together by covalent bonds, so this compound contains both ionic and covalent bonds.