The element with positive electron gain enthalpy is

Which of the following species has the highest electron affinity?

The highest electron affinity is shown by

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F, and Cl?

The order of decreasing negative electron gain enthalpy of O, S, Se is

Elements of which of the following groups will form anions most readily?

Which one of the following ionic species has the greatest proton affinity to form stable compound?

Electronegativity of the following elements increases in the order

The correct order of electronegativities of N, O, F and P is

Among the elements B, Mg, Al, and K, the correct order of increasing metallic character is