Metallic ions are positively charged particles formed when metal atoms lose one or more electrons. This process occurs during chemical reactions, particularly in the formation of compounds. Common examples of metallic ions include sodium (Na⁺), calcium (Ca²⁺), and iron (Fe²⁺). These ions play essential roles in various biological and chemical processes. In solutions, metallic ions can conduct electricity, making them important in electrochemistry. They also participate in forming ionic bonds with non-metallic ions, resulting in compounds like sodium chloride (NaCl). Understanding metallic ions is crucial in fields such as chemistry, biology, and materials science.