Second electron affinity is positive. Why ?!..
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https://www.meritnation.com/ask-answer/question/is-second-electron-affinity-less-than-first-electron-affinit/periodic-classification-of-elements/9769519
https://www.meritnation.com/ask-answer/question/is-second-electron-affinity-less-than-first-electron-affinit/periodic-classification-of-elements/9769519