What term is used for an ion with a positive charge?

A positively charged ion is referred to as a cation. This term originates from the Greek word "kata," which means "down," indicating the direction of movement towards the cathode during electrolysis.

Cations are formed when an atom or molecule loses one or more electrons, resulting in a net positive charge due to the predominance of protons in the nucleus. This process is fundamental in various chemical and biological interactions, including those involved in skin care treatments. For instance, certain treatments utilize positively charged ions to enhance the penetration of active ingredients into the skin, capitalizing on the properties of cations.

In contrast, anions refer to negatively charged ions, electrolytes encompass a broader category that includes both anions and cations in solutions, while a neutral ion implies that there is no net charge, which does not fit the context of a positively charged ion. Understanding these terms is crucial for comprehending the chemical interactions relevant to skin chemistry and treatments in skincare.