kkz i know da two chemists are gone (Ahmed and Sayf) but if anyone can help then ur a STAR...
Q) Explain why the second electron affinity is always endothermic... the answer is A) A negative electron is added to a negative ion and the two negative charges repel. ^^^ how does that even link to it being endothermic?? o.O
Marwa sorry to tell you this but your book is stupid. That is the worst explanation ever. The reason why it is exothermic is because it energy is released when an electron is taken in by a substance, just liek when 2 elements combine to form a compound it is an exo reaction.