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The negative value of electron gain enth...

The negative value of electron gain enthalpy is less for fluorine than for chlorine . Why?

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The correct Answer is:
A
Electron gain enthalpy of F is less than that of Cl because when an electron is added to F, the added electron goes to the smaller n=2 quantum level and suffers repulsion from other electrons present in this level.
In case of Cl, the added electrons goes to the larger n=3 quantum level and suffers much less repulstion from other electrons.
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Assign reason for the following: The negative value of electron gain enthalpy of fluorine is less than that of chlorine.

Electron gain enthalpy of fluorine is less than that of chlorine. Why?

Knowledge Check

  • Electron gain enthalpy is greater than zero for

    A
    `Na`
    B
    `Mg`
    C
    `A1`
    D
    `Sn`

  • The lower electron affinity of fluorine than that of chlorine is due to

    A
    Smaller size
    B
    Smaller nuclear charge
    C
    Difference in their electronic arrangement
    D
    Its highest reactivity

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