Question

Which of the following has more electron gain enthalpy.
F or O​

Answer 1

Answer:

oxygen

Explanation:

because it has 6 valence electrons .so it needs two electrons to full fill his octate

and flurine has 7 valence electrons present in it's outermost shell. so, it needs only one electrons to full fill his octate.

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Answer 2

Answer:

As F contains one proton more than O, its nucleus can attract the incoming electron more strongly in comparison to the nucleus of O atom. Also, F needs only one more electron to attain the stable noble gas configuration. Hence, the electron gain enthalpy of F is more negative than that of O.