Electron Affinities: Fluorine vs Chlorine & EA Explained

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SUMMARY

The discussion centers on the electron affinity (EA) of Fluorine compared to Chlorine, highlighting that Fluorine has a higher EA despite periodic trends suggesting otherwise. Participants clarify that EA refers to Electron Gain Enthalpy, emphasizing that the stability of the electron configurations of F- and Cl- plays a crucial role in this phenomenon. The consensus is that the energy required to remove an electron from F- is greater than that from Cl-, thus explaining the observed higher EA for Fluorine.

PREREQUISITES
  • Understanding of Electron Affinity and Electron Gain Enthalpy
  • Knowledge of periodic trends in electronegativity
  • Familiarity with electron configurations of ions
  • Basic principles of atomic and molecular properties
NEXT STEPS
  • Research the electron configurations of Fluorine and Chlorine ions
  • Explore the concept of Electron Gain Enthalpy in detail
  • Investigate periodic trends in electronegativity and their implications
  • Study the stability of anions and their relation to electron affinity
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Chemistry students, educators, and professionals interested in atomic properties, particularly those studying electron affinity and periodic trends.

kay
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Why is the EA of Fluorine higher than chlorine when it shouldn't be according to periodic trends?

And in general when it is easy to add an electron to a substance, then is the EA high or low?
 
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I forgot to add that by EA i meant 'Electron Affinity.' I think that's all. :(
 
Are you referring to electronegativity? The trend is higher as you go up and right on the periodic table, so F being more electronegative than Cl does not defy the trend.

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I mean Electron Gain Enthalpy or Electron Affinity.
 
So is there no one who knows the answer? :eek:
 
I think it can be explained by use of electron configuration of both F- and Cl-; one is more stable than the other. Therefore the energy to remove an electron from it is essentially larger than that of the other.
 

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