Difference between revisions of "Negative Ion"
(No difference)
|
Revision as of 20:46, 13 January 2019
Key Stage 4
Meaning
Negative ions are elements or compounds which have gained one or more electrons to become negatively charged.
About Negative Ions
- In chemical reactions between metals and non-metals the non-metal elements form negative ions.
- In alkalis there are free moving hydroxide ions which are negative ions. The concentration of these OH- ions is what determines the alkalinity of a solution.
- Negative ions are attracted to positive ions and to the positive electrode (anode) during electrolysis.
Examples
 |
 |
 |
| Chlorine forms -1 ions. | Oxygen forms -2 ions. | Nitrogen forms -3 ions. |