Question

Why is electron gain enthalpy of N less negative than O??

Answer 1

Answer:

Electron affinity of nitrogen is lower(less negative ) than carbon. or nitrogen has positive electron gain enthalpy. First of all, Just as energy required to remove anelectron from an atom, energy is released when an electron is added to a neutral atom.

Answer 2

Answer:

Oxygen has 2p4 electrons, so process of adding an electron to the p-orbital is exothermic. Oxygen has lower ionisation enthalpy than nitrogen because by removing one electron from 2p-orbital, oxygen acquires stable configuration, i.e., 2p3.S