Question

which among the following has the most positive and the most negative electron gain enthalpy :O, Ar, Na, S​

Answer 1

Answer:

Na will have high electropositive . O will have high electron negativity

Answer 2

Answer:

S has high electron gain enthalpy because in sulphur there is more inter-electronic repulsion than oxygen, therefore, more energy is released in case of sulphur on gaining electrons.