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GCSE Chemistry · key term
A charged particle that is free to move and can therefore transfer charge through a substance.
Used by Edexcel and OCR
Specification 1.33, 1.34 · Paper 1, Paper 2
Revise: Properties of Ionic CompoundsThis is a question of mobility, not a lack of charge: the solid contains ions, but they are not mobile charge carriers.
A charged particle, such as an ion or electron, that is able to move through a substance and transfer charge.
Avoid saying that electrons move through an ionic compound. The mobile charge carriers in molten ionic compounds and their aqueous solutions are ions.
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Specification C2.3f · Paper 1 (Foundation), Paper 3 (Higher)
An ion or electron that is free to move through a material and can therefore carry electric charge.
Revise: Fundamentals of Bulk PropertiesElectrical conduction requires mobile charge carriers. A material may contain charged particles but fail to conduct if those particles are fixed in place. Conversely, mobile ions or delocalised electrons can carry charge through a material.