Question

ELEMENT WITH HIGHEST NEGATIVE ELECTRON GAIN ENTHALPY
1) FLUORINE
2)CHLORINE
3)OXYGEN
4)SULPHUR

Answer 1

ELEMENT WITH HIGHEST NEGATIVE ELECTRON GAIN ENTHALPY IS FLUORINE.

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Answer 2

The electron gain enthalpy of third elements is higher than 2nd period elements as with increase in atomic size ,the attraction of the nucleus for the incoming electron decreases and hence the electron gain enthalpy becomes less negative

Hence chlorine has the highest electron gain enthalpy

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