Question

write some factor affecting electron affinity ?

Answer 1

Hey mate !!!
- . Smaller the size of an atom, greater is its electron affinity. As the size of atom increases, the effective nuclear charge decreases or the nuclear attraction for adding electrondecreases. Consequently, atom will have less tendency to attract additional electrontowards itself.




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Answer 2

$factor \: affecting \: electron \\ affinity$

◻️ atomic size or atomic radius.

when the size or radius of an atom increases , the electron entering the outermost orbit is more weakly attracted by the nucleus and the value of electron affinity is lower.


◻️ effective Nuclear charge

when effective Nuclear charge is more then, the atomic size less . then the atom can easily gain an electron and higher electron affinity.


◻️ stability of fully - filled and half filled orbitals.


the stability of the configuration having fully - filled orbitals ,
${p}^{6} {d}^{10} {f}^{14}$
and half orbital
${p}^{3} {d}^{5} {f}^{7}$
is relatively higher than that of other configurations . hence such type of atoms have less tendency to gain an electron , therefore their electron affinity values will be very low or zero.


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