Which set of elements shows positive electron gain enthalpy? (1) He, N, O(2) Ne, N, CI(3) O, CI, F(4) N, He, Ne

Which set of elements shows positive electron gain enthalpy? (1) He,

1.	Which set of elements shows positive electron gain enthalpy? (1) He, N, O(2) Ne, N, CI(3) O, CI, F(4) N, He, Ne
Answer» He, N, O this set SHOW positive ELECTRON GAIN