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

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

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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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