1 The formation of the oxide ion 02 from oxygen atom

Last updated: 6/28/2023

1 The formation of the oxide ion 02 from oxygen atom requires first an exothermic and then an endothermic step as shown below 1 O g e Qg A H 141 kJ mol Piste Oge0 A H 780 kJ mol 8 Thus process of formation of O in gas phase is unfavourable even though O is isoelectronic with neon It is due to the fact that a Orion has comparatively smaller size than oxygen atom b oxygen is more electronegative c addition of electron in oxygen results in larger size of the ion d electron repulsion outweighs the stability gained