Question

why do halogen elements possess maximum electron affinity?​

Answer 1

Answer:

✔Electron affinity reflects the ability of an atom to accept an electron.✔ Group VIIA elements, the halogens, have highest electron affinities because the addition of an electron to an atom results in a completely filled shell.✔❤☺✌

Answer 2

Answer:

Halogens have 7 electrons in its outermost shell. We know that atoms react to attain an octet. Now, the halogen can either lose 7 electrons or gain 1 electron. If it has to lose 7 electrons, it would require a lot of energy. Moreover, the atom will not be stable anymore as there would be 7 extra protons. Thus, halogens do not usually lose electrons. The nuclear charge makes it extremely difficult.

However, it is not impossible to force halogens to lose electrons. For example, oxygen (six electrons in its outermost shell, just an example) can be oxidised to O^+!!! (Yes, you read that right). Oxidising means ripping off the electrons.

Hope it helps

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