Positively charged ions, known as cations, are atoms or molecules that have lost one or more electrons. This loss of negatively charged electrons results in a net positive charge. For example, when a sodium atom loses an electron, it becomes a sodium cation (Na+), which plays a crucial role in various chemical reactions and biological processes. These cations are essential in many areas, including electrolytes in our bodies, where they help maintain fluid balance and nerve function. Additionally, they are important in ionic compounds, where they bond with negatively charged ions, or anions, to form stable structures like table salt (NaCl).