electron affinity

[datdat]

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when the energy released, it is positve or negative electron affinity?

which convention should i follow for the DAT?

 

[bennijai]

Electron affinity is the energy change when gaining an e-. When an atom gains an e- it is releasing energy thus electron affinity is usually related to exothermic reactions. It is a negative energy change. That's my two cents, I hope someone can confirm this.