Ionic bond involves the complete transfer of electrons from one atom to another. This occurs between a metal atom (which tends to lose electrons) and a non-metal atom (which tends to gain electrons). The resulting ions are held together by electrostatic forces, forming an ionic compound.

Explanation:
1. Definition of an ionic bond:
An ionic bond is a type of chemical bond that forms between atoms when one or more electrons are completely transferred from one atom to another. This transfer of electrons creates positively charged ions (cations) and negatively charged ions (anions), which are then attracted to each other and form an ionic bond.

2. Complete transfer of electrons:
In an ionic bond, the transfer of electrons is complete. This means that one atom completely loses one or more electrons, while the other atom gains those electrons to achieve a stable electronic configuration. The atom that loses electrons becomes a positively charged ion, while the atom that gains electrons becomes a negatively charged ion.

3. Metal and non-metal atoms:
Ionic bonds typically occur between a metal atom and a non-metal atom. Metals tend to have low ionization energies, meaning they readily lose electrons to achieve a stable electron configuration. Non-metals, on the other hand, have high electron affinities, meaning they readily gain electrons to achieve a stable electron configuration.

4. Formation of an ionic compound:
When a metal atom loses electrons and a non-metal atom gains those electrons, the resulting ions are attracted to each other due to the opposite charges. This attraction between positively and negatively charged ions forms an ionic bond. The resulting compound is called an ionic compound or an ionic salt.

5. Examples of ionic compounds:
Some common examples of ionic compounds include sodium chloride (NaCl), calcium carbonate (CaCO3), and magnesium oxide (MgO). In each of these compounds, the metal atom (sodium, calcium, or magnesium) loses one or more electrons to the non-metal atom (chlorine, carbon, or oxygen), resulting in the formation of ions and an ionic bond.

In conclusion, an ionic bond involves the complete transfer of electrons from one atom to another, typically between a metal atom and a non-metal atom. This transfer of electrons results in the formation of oppositely charged ions that are held together by electrostatic forces, forming an ionic compound.