Contents
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