Formation of ionic bond is favoured by

Explanation

Ionic bonds are formed between atoms when one atom donates electrons (forming a positively charged cation) and another atom accepts those electrons (forming a negatively charged anion). Ionic bonding typically occurs between a metal atom (which easily loses electrons to become a cation) and a nonmetal atom (which readily gains electrons to become an anion). In this context, the formation of an ionic bond is favored by a low ionization energy (I.E) of the metal atom. Ionization energy refers to the energy required to remove an electron from an atom or ion. A low ionization energy means that the metal atom can easily lose electrons to form a cation.