Question

Which of the following pairs will form the most stable ionic bond ?
(a) Na and Cl
(b) Mg and F
(c) Li and F
(d) Na and F

Answer 1

Answer:

(b) Mg and F

Explanation:

Ionic bonding is defined as the complete transfer of valence electrons between the atoms. It is a type of chemical bond generating two oppositely charged ions. In ionic bonds, the metal often loses the electrons to become a positively charged cation, whereas the non-metal element accepts those electrons to become a negatively charged anion.

The stability of an ionic bond is dependent on the lattice energy. In the given options the lattice energy is expected to be more between Mg and F due to the +2 charge on Mg atom. Thus, the ionic bond between Mg and F is more stable than others because in this pair due to the presence of plus two positive charge the electrostatic force of attraction is maximum.

Thus, the most stable ionic bond is formed by the pair (b) Mg and F

Answer 2

Answer:(b)Mg and F

Since Mg  2+   has a small size and high charge of all the actions so it's interactions with F  will be strongest.  

Hence the most stable out of all ionic compounds.