Question

Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.​

Answer 1

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Factors affecting electron gain enthalpy :-

✍️ Electronic Configuration : Electron gain enthalpy becomes more negative as the number of valence electrons increases. Hence, it increases along a period.

✍️ Effective nuclear charge : As the effective nuclear charge increases from left to right it is easier to add an electron to a smaller atom.

✍️ Size of the atom : As the size of the atom increases, electron gain enthalpy becomes less negative.

» Trend in a period - Electron gain enthalpy becomes more negative across a period.

» Trend in a group - Electron gain enthalpy becomes less negative as we move down a group.

✨Hope it will help you.✨

Answer 2

Answer:

Thus, smaller the size of atom, greater is the electron gain enthalpy. (ii) Nuclear charge: Greater the nuclear charge, Stronger is the attraction for the added electron towards nucleus.

Explanation: