Why first EA is exothermic but second EA is endothermic?
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The first electron affinity is negative because energy is released in the process of adding one electron to the neutral oxygen atom. ... When the second electron is added you have to put energy in, rather than energy being released.
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Sara Chelaghma, I'm into science, chemistry specifically. The first electron affinity is negative because energy is released in the process of adding one electron to the neutral oxygen atom. ... When the second electron is added you have to put energy in, rather than energy being released.
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