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Discuss the factors affecting electron g...

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

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Knowledge Check

  • Second electron gain enthalpy:

    A
    is always negative
    B
    is always positive
    C
    can be positive or negative
    D
    is always zero

  • Electron gain enthalpy will be positive in

    A
    `O^(-2)` is formed from `O^(-1)`
    B
    `O^(-1)` is formed from O
    C
    `S^(-1)` is formed from S
    D
    `Na^(-)` is formed from Na

  • Electron gain enthalpy is positive when:

    A
    `O^(-)` is formed form `O`
    B
    `O^(2-)` is formed from `O^(-)`
    C
    `O^(+)` is formed form `O`
    D
    electron affinity is always a negative value

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