Main Article |
Discussion |
Related Articles [?]
|
Bibliography [?]
|
External Links [?]
|
Citable Version [?]
|
|||||||||||||||
|
An ion is an atom or a molecule that has lost or gained electrons. If an atom loses one or more electrons, it becomes a positively charged ion called a cation. If it gains an electron, it becomes a negatively charged ion called an anion.