The first electron affinity value for oxygen is _______ and the second electron affinity value is ________.
A) favorable (exothermic), favorable (exothermic)
B) More information is needed.
C) favorable (exothermic), unfavorable (endothermic)
D) unfavorable (endothermic), favorable (exothermic)
E) unfavorable (endothermic), unfavorable (endothermic)

Question

Quizplus · Accepted Answer

The first electron affinity for oxygen is favorable (exothermic) as oxygen has a high electronegativity and readily accepts an electron to form an anion. However, the addition of a second electron to an already negatively charged oxygen ion is unfavorable (endothermic) as the repulsion between the electrons makes it energetically unfavorable.

The First Electron Affinity Value for Oxygen Is _______ and the Second