Electron affinity
What Electron affinity means in Chemistry A-Level, as defined for AQA, OCR.
Definitions of Electron affinity
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Reference: OCR
Terms for the non-metal are added, with the first electron affinity of chlorine given a negative sign and the second electron affinity of oxygen endothermic with a positive sign.
The relevant energy term of the non-metal that is combined with the other terms through a Born–Haber cycle.
The addition of electrons to the non metal atoms as a step in building gaseous ions.
Topics that use Electron affinity
- Born–Haber cycles (A-level only) (AQA A-Level)
- Lattice enthalpy (OCR A-Level)
Related terms
- Born–Haber cycle
- enthalpy of formation
- lattice dissociation enthalpy
- Lattice enthalpy
- Covalent character
- Effect of ionic charge and radius on lattice enthalpy
- Enthalpy change of hydration
- Enthalpy change of solution
Using Electron affinity in the exam
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