Binary ionic bonds are formed between a metal and a non-metal. In these bonds, one atom donates one or more electrons to another atom, resulting in two oppositely charged ions. The metal atom becomes positively charged (cation), while the non-metal atom becomes negatively charged (anion). The electrostatic attraction between these oppositely charged ions holds the binary ionic compound together.

For example, in sodium chloride (NaCl), the sodium atom donates one electron to the chlorine atom, resulting in the formation of Na+ and Cl- ions. These ions are then held together by electrostatic attraction to form the ionic compound, sodium chloride.

Binary ionic bonds are typically strong and have high melting and boiling points. This is because the electrostatic attraction between the ions is very strong. However, binary ionic compounds are also brittle and can easily be shattered when subjected to mechanical stress. This is because the ions are held together by strong electrostatic forces, but they are not very flexible.

Binary ionic compounds are found in a wide variety of applications, including table salt, baking soda, and plaster of Paris. They are also used in many industrial processes, such as the production of steel, glass, and cement.