Which will have the maximum value of electron affinity O ,O- , O2- and why?
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O- have strong electron affinity as by gaining 1 more electron it will have valence eletronic configuration
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Answer:
O- will have maximum value of electron affinity.
Explanation:
If we observe electronic configuration, O- require only one electron to complete its octet, whereas O2- has inert gas configuration and O is two less electron to its octet. So, O- will have maximum electron affinity so that it completes its octet and get stabilised.
O : 1s^2, 2s^2, 2p^4
O- : 1s^2, 2s^2, 2p^5
O2-: 1s^2, 2s^2, 2p^6
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