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Which of the following has the highest positive electron gain enthalpy? (1) F (2) O​​​​​​- (3) Na+ (4) Mg+2 (P.s: according to me the answer should be Mg+2, but the answer is o- .why? )

Answer» Which of the following has the highest positive electron gain enthalpy?
(1) F
(2) O​​​​​​-
(3) Na+
(4) Mg+2
(P.s: according to me the answer should be Mg+2, but the answer is o- .why? )


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