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|  | {{Def2|
 |  | #REDIRECT [[negative ion]] | 
|  | An atomic or molecular species having a net negative electric charge. 
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|  | == Orange Book entry ==
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|  | {{orange|
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|  | An atom, radical, molecule or molecular moiety in the vapour phase which has gained one or more electrons, acquiring thereby a negative charge. The term [[anion]] is not recommended because of its connotations in solution chemistry.
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|  | }}
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|  | == Gold Book entry ==
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|  | {{gold|
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|  | http://goldbook.iupac.org/N04098.html
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|  | An atom, radical, molecule or molecular moiety in the vapour phase which has gained one or more electrons thereby acquiring an electrically negativecharge. The use of the term [[anion]] as an alternative is not recommended because of its connotations in solution chemistry.
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|  | See: [[positive ion]]
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|  | '''Source''':
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|  | PAC, 1991, 63, 1541 ([[Recommendations for nomenclature and symbolism for mass spectroscopy]] (including an appendix of terms used in vacuum technology). (Recommendations 1991)) on page 1549
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|  | [[Orange Book]], p. 204
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|  | }}
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|  | [[Category:Ions]]
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|  | [[Category:Orange Book term]]
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