Which in each pair of elements has a more negative electron gain enthalpy? (a) F or Cl^- ,( b) O or O^-,( c) Na^+or S , ( d) F or F^-

Which in each pair of elements has a more negative electron gain entha

1.	Which in each pair of elements has a more negative electron gain enthalpy? (a) F or Cl^- ,( b) O or O^-,( c) Na^+or S , ( d) F or F^-
Answer» ANSWER :(a) Oxygen or Fluorine,(B) Fluorine or chlorine ,(C) Fluorine(F) ,(d) Chlorine