Question

Which of the following pairs of elements would have a more negative electron gain
enthalpy? explain
(1) O or F (l) F or C​

Answer 1

Answer:

(i) O or F. Electron gain enthalpy of F is much more negative than that of O. This is because as we from O to F, the atomic size decreases and nuclear charge increases, thereby increase the attraction of the nucleus for the incoming electron and hence electron gain enthalpy becomes more negative.