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Created page with "==Key Stage 4== ===Meaning=== '''Negative ions''' are elements or compounds which have gained one or more electrons to become [[Negative Charge|negatively charged]..."
==Key Stage 4==
===Meaning===
'''Negative ions''' are [[element]]s or [[compound]]s which have gained one or more [[electron]]s to become [[Negative Charge|negatively charged]].
===About Negative Ions===
: In [[Chemical Reaction|chemical reactions]] between [[metal]]s and [[non-metal]]s the [[non-metal]] [[element]]s form '''negative ions'''.
: In [[alkali]]s there are free moving [[Hydroxide Ion|hydroxide ions]] which are '''negative ions'''. The [[concentration]] of these [[Hydroxide Ion|OH<sup>-</sup> ions]] is what determines the [[alkalinity]] of a [[solution]].
: '''Negative ions''' are attracted to [[Positive Ion|positive ions]] and to the [[anode|positive electrode (anode)]] during [[electrolysis]].
===Examples===
{| class="wikitable"
|[[File:ChlorineIonFormation.png|center|200px]]
|[[File:OxygenIonFormation.png|center|200px]]
|[[File:NitrogenIonFormation.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Chlorine]] forms -1 [[ion]]s.
| style="height:20px; width:200px; text-align:center;" |[[Oxygen]] forms -2 [[ion]]s.
| style="height:20px; width:200px; text-align:center;" |[[Nitrogen]] forms -3 [[ion]]s.
|}
===Meaning===
'''Negative ions''' are [[element]]s or [[compound]]s which have gained one or more [[electron]]s to become [[Negative Charge|negatively charged]].
===About Negative Ions===
: In [[Chemical Reaction|chemical reactions]] between [[metal]]s and [[non-metal]]s the [[non-metal]] [[element]]s form '''negative ions'''.
: In [[alkali]]s there are free moving [[Hydroxide Ion|hydroxide ions]] which are '''negative ions'''. The [[concentration]] of these [[Hydroxide Ion|OH<sup>-</sup> ions]] is what determines the [[alkalinity]] of a [[solution]].
: '''Negative ions''' are attracted to [[Positive Ion|positive ions]] and to the [[anode|positive electrode (anode)]] during [[electrolysis]].
===Examples===
{| class="wikitable"
|[[File:ChlorineIonFormation.png|center|200px]]
|[[File:OxygenIonFormation.png|center|200px]]
|[[File:NitrogenIonFormation.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Chlorine]] forms -1 [[ion]]s.
| style="height:20px; width:200px; text-align:center;" |[[Oxygen]] forms -2 [[ion]]s.
| style="height:20px; width:200px; text-align:center;" |[[Nitrogen]] forms -3 [[ion]]s.
|}