Why the second electron gain enthalpy of oxygen is +vc value?

Why is the electron gain enthalpy of oxygen is less than that of sulphur?

(i) Why is theh electron-gain enthalpy of oxygen is less than that of sulphur? (ii) Arrange the following metal oxides in terms of ascending order of basicity: ZnO, MgO, CaO, CuO.

Second ionisation enthalpy of Mg is sufficiently high and second electron-gain enthalpy of O has a positive value. How do you explain the existence of Mg^(2+)O^(2-) rather than Mg^(+)O^(-) ?

This question has statement I and statement II of the four choices given after the statements choose the one that best describes the two statements Statement -I: electron gain enthalpy of oxygen is less negative than that of flourine but more -ve than that of nitrogen Statement-II:ionization enthalpy is as follows N>O>F

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

This question has statement I and statement II of the four choices given after the statements choose the one that best describes the two statements Statement -I: The second electron gain enthalpy of an element I staken as positive Statement-II:energy i sreleased when an electron is added to the atom

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

Why is the value of electron-gain enthalpy negative?