Question

How does electron gain enthalpy vary down the group and along the period?

Answer 1

electron gain enthalpy increases along the period and decreases along the group .

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Answer 2

Electron gain enthalpy:-

• along the period:- increases due to which force of attraction between nucleus and incoming electron increases, and they have strong tendency to accept the electron and larger energy will be released. so electron gain enthalpy become more negative.
• down the group:- decreases due to which force of attraction between nucleus and incoming electron decreases and they have less tendency to accept the electron and lesser energy will be released. so electron gain enthalpy become less negative.

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