Question

The electron affinity of oxygen is ______ than that of S.

Answer 1

The electron affinity of oxygen is less than that of S.

Explanation:

Although oxygen is above sulphur in Group 16, its smaller atomic size leads to greater electron-electron repulsion in the compact 2p orbital. This makes the electron affinity of oxygen less than that of sulphur, which has a larger size and a more diffused 3p orbital.