| Charge | Positive or negative |
|---|---|
| Can be | Atomic or molecular |
| Related to | Electrolytes and chemical reactions |
Definition and context
An ion has a net charge because the number of electrons does not exactly balance the charge of its nuclei. It can be positive or negative, and consist of an atom or a group of atoms. In suitable media, its movement enables it to transport charge.
In a battery, talking about ions and electrons means distinguishing their paths and materials. They are not interchangeable names for the same particle. If we draw the external circuit and the electrolyte in different colors, we can ask which species moves through each region. This simple drawing helps avoid attributing the behavior of any one ion to another without specifying the system's composition, environment, and conditions.
What we know and its limits
Introductory reference sheet. Properties and applications depend on measurement conditions; consult the sources before making comparisons.
Follow the evidence
The original sources for exploring this explanation and its limits.
- DOE Explains… Batteries
U.S. Department of Energy
Electrochemical storage, movement of charges, and degradation. - Chemistry 2e · Redox Reactions
OpenStax · Rice University
Oxidation, reduction, and electron balancing.
Image credits
SciClue · AI-generated illustration (OpenAI) · Original source · Recurso editorial de SciClue · generado con IA