Question

Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer.

Assertion (A): The value of electron gain enthalpy decrease while moving left to right in a period. Reason (R): The electron gain enthalpy is the energy which released hence it represented with negative sign.

What is the basic difference between the term electron gain enthalpy and electronegativity?

A) Arrange the following elements on the basis of first ionization enthalpy. Li, Be, B, C, N, O, F, Ne B) Arrange the following on the basis of their electron affinity. N, P, O, S, F, Cl