Question

why electron affinity of clhorine is greater than fluorine?
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Answer 1

Answer:

may it's helpful to you ✌️✌️✌️

Answer 2

Electron affinity:-

its the capacity of an species to attract the electron towards itself....which is based on our threotical or hypothetical observation.

Electronegativity:-

its ability of any species to attract electron towards itself in a bonded state ....which is the actual experimental thing happening.

now return to your ques....

1. electon affinity of cl is higher than f because as the size of florine is very small and it already had 3 lone pairs on it...so to sum of all attraction any other electron faces many repulsion to fluorine electron clouds..
2. while cl its repulsion is much lower than fluorine...so its affinity to attract electrons increases ..
3. while when fine the f and cl in any bonded state...then they follow the general rule...as of florine has high electronegativity acc to laws of periodic table .

Note:

so the key point to note here is that when we said electron affinity it is defined for an isolated gaseous atoms but when we define electronegativity it is to be defined when the atoms are in bonded state ...