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Delocalised Electrons

Key Stage 3

Meaning

Free electrons are electrons which can move from one atom to another.

About Free Electrons

Electrons are normally bound to a single atom. Free electrons are able to move from one atom to the next.
Materials with free electrons can have an electrical current when a potential difference is applied.

Key Stage 4

Meaning

Delocalised electrons are electrons which can move from one atom to another.

About Free Delocalised

Electrons are normally bound to a single atom. Delocalised electrons are able to move from one atom to the next.
Materials with delocalised electrons can have an electrical current when a potential difference is applied.
A metallic bond is held together by the delocalised electrons which are attracted to the positive metal ions.

References

AQA

Delocalised electrons, pages 33-35, GCSE Chemistry; The Revision Guide, CGP, AQA
Delocalised electrons, pages 49-51, 53, GCSE Chemistry; Third Edition, Oxford University Press, AQA
Delocalised electrons, pages 87, 90, GCSE Combined Science Trilogy; Chemistry, CGP, AQA
Delocalised electrons, pages 89, 92, GCSE Chemistry, CGP, AQA

Edexcel

Delocalised electrons, pages 24, 25, GCSE Chemistry; The Revision Guide, CGP, Edexcel
Delocalised electrons, pages 63-65, GCSE Chemistry, CGP, Edexcel

OCR

Delocalised electrons, pages 21, 24, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR
Delocalised electrons, pages 66-67, Gateway GCSE Chemistry, Oxford, OCR
Delocalised electrons, pages 94, 96, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR