Difference between revisions of "Negative Ion"
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| + | :[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Negative ions (anions0, pages 56-57, 88, 122, 125, 150-151, 272-273, Gateway GCSE Chemistry, Oxford, OCR ''] | ||
Latest revision as of 06:41, 15 December 2019
Contents
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
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| Chlorine forms -1 ions. | Oxygen forms -2 ions. | Nitrogen forms -3 ions. |
References
AQA
- Negative ion, testing, page 263, GCSE Chemistry; Student Book, Collins, AQA
- Negative ions, page 70, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
- Negative ions, pages 39, 188-189, GCSE Chemistry; Third Edition, Oxford University Press, AQA
- Negative ions, pages 72, 258-261, GCSE Chemistry, CGP, AQA