Question

Between $\mathrm{NaCl}\mathrm{and}\mathrm{CsCl}$, which has greater strength of ionic bond? Justify.

Answer 1

• $\mathrm{CsCl}$ has more ionic bond strength than NaCl. The lattice energy is directly proportional to the ion charge and inversely proportional to the radius of the atom. The radius ${\mathrm{Cs}}^{+}$ is now much greater than ${\mathrm{Na}}^{+}$ between$\mathrm{NaCl}$ and $\mathrm{CsCl}$, even though $\mathrm{CsCl}$ is more ionic, there is still more radius and thus less lattice energy.
• As atoms pass electrons to each other, ionic bonds form, creating ions that are electrically interested in one another, forming a bond between them. A typical ionic compound is a common salt (NaCl). A relatively strong bond and a three-dimensional, cubic structure form ionic bonds between each atom.
• Therefore, $\mathrm{CsCl}$ has greater strength of ionic bond.