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Why the ionization enthalpy dicreases down …

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Why the ionization enthalpy dicreases down the group?

    • Posted by Hamdan Hamdan 7 years, 11 months ago

    CBSE > Class 11 > Chemistry
    • 3 answers

    Osama Malik 7 years, 11 months ago

    Ionisation enthalpy is amount of energy needed to remove most losely bonded electron from valence shell. As we move down the group the size increases and outermost or valence shell moves far away from neucleus. So it will be removed easily as effect of attraction of neucleus decreases.So ionisation enthalpy decreases.

    1Thank You

    Yashu Tyagi 7 years, 11 months ago

    Due to increase in atomic size

    1Thank You

    A Z 7 years, 11 months ago

    While moving down a group the atomic number increases and the number of shells also increases. As a result of it the outermost shell is far away from the nucleus so the ionization enthalpy decreases moving down a group.

    2Thank You

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