Identify the types of elements that form ionic bonds.

Metals: These elements are typically found on the left side of the periodic table. They have a tendency to lose electrons and form positive ions (cations). Examples include sodium (Na), magnesium (Mg), and calcium (Ca).

Nonmetals: These elements are usually located on the right side of the periodic table. They have a tendency to gain electrons and form negative ions (anions). Examples include chlorine (Cl), oxygen (O), and sulfur (S).

Formation of Ionic Bonds: Ionic bonds are formed when metals transfer electrons to nonmetals. This transfer creates a strong electrostatic attraction between the positively charged cations and the negatively charged anions, resulting in the formation of an ionic compound. For example, sodium (a metal) can transfer an electron to chlorine (a nonmetal) to form sodium chloride (NaCl).