following elements have more negative electron gain enthalpy?a) F b) Ci c) Br d) I
Question
Following elements have more negative electron gain enthalpy?
a) F
b) Cl
c) Br
d) I
Solution
The electron gain enthalpy becomes less negative as we move down a group in the periodic table. This is because as we move down a group, the atomic size increases. As a result, the incoming electron is less attracted by the nucleus and hence, less energy is released.
So, the order of electron gain enthalpy (from more negative to less negative) for the given elements (which belong to the same group - Halogens) would be:
F > Cl > Br > I
Therefore, Fluorine (F) has the most negative electron gain enthalpy among the given elements.
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