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

Answers (1)

Factors Affecting Electron Gain Enthalpy:

  • Nuclear charge: As nuclear charge increases the gain enthalpy becomes more negative.
  • Size of the atom: As nuclear charge increases, the gain enthalpy becomes less negative.
  • Electronic configuration: Electron gain enthalpy is less negative for elements which have a stable, half-filled or completely filled electronic configuration.

 Trends in variation in the periodic table:

  1. In period: The electron gain enthalpy increases from left to right in a period.
  2. In group: The electron gain enthalpy decreases from top to bottom in a group.

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