Question

Why electron gain enthalpy increases in the period?

Answer 1

Explanation:

The electron gain enthalpies of elements become more negative along a period. This is because as we move across a period, the atomic size decreases and effective nuclear charge increases. Both these factors result in greater attraction for the incoming electron. Hence electron gain enthalpy increases in a period from left to right.

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Answer 2

Answer:

Explanation:

It is because in periods., size generally goes on decreasing and no. Of electron continuously increases, so to add one more electron some time it leads to repulsion so its need enthalpy which is electron gain enthalpy