Question

the second Electronic affinity of an element is always positive. justify.. what is your opinion ???​

Answer 1

Answer:

If we want to add one more electron after the addition of one electron then the incoming electron will face repulsions from the electrons in valence shells. So we need to provide some energy if we want to add one more electron to M− ion. Hence the second electron affinity of an element is endothermic.

Explanation:

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Answer 2

Electron affinity is always negative because electron affinity is a amount of energy required to add a electron