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Why noble gases have very high values of...

Why noble gases have very high values of ionisation enthalpies?

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Because in noble gases, the electronic configuration of the valence shell is `ns^2 np^6`. They have no tendency to lose electron from stable configuration. Thus they have very high values of ionisation enthalpies.
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Knowledge Check

  • In a period from Li to F ionisation enthalpy

    A
    increases
    B
    decreases
    C
    remains same
    D
    none of these

  • Which of the following metals have high first ionisation enthalpy:

    A
    `Ti`
    B
    `Zn`
    C
    `Sc`
    D
    `Cr`

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