Question

The formation of the oxide ion O 2- (g) requires first an exothermic and then an endothermic step - as shown below: O (g) + e - ====> O - (g) ; ΔH 0 = -142 kJ mol -1 O - (g) + e - ====> O 2- (g) ; ΔH 0 = +844 kJ mol -1 This is because: A) oxygen is more electronegative B) oxygen has high electron affinity C) O - ion will tend to resist the addition of another electron D) O - ion has comparatively larger size than oxygen atom

Answer 1

Answer:

d

Explanation:

the oxygen has camparatively larzer size than axygen atom

Answer 2

Answer:

d

Explanation:

the oxygen has comparatively larger size than oxygen atom