Why is the bond in an ionic compound is so strong?

Answer 1

Just remember that an atom has protons and electrons. Looking at an ionic bond at the molecular level, one atom takes electrons from the other atom. Now, one of the atoms has more electrons than the other. Look at the atom that lost electrons - it's missing a shell; there is less electron shielding, and a lot more places for the protons in the nucleus to attract electrons. Conveniently, the atom right next to this one has an abundance of electrons, and they are both attracted to each other.

--> Think of the atom that lost electrons as positively charged, and the atom that gained electrons negatively charged.

Answer 2

The bond in an ionic compound is strong because it is formed by the electrostatic attraction between positively and negatively charged ions. These ions are held together in a crystal lattice structure by strong forces of attraction, resulting in a stable chemical bond.