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Second ionization energy of an eleme...

Second ionization energy of an element is higher than its first ionization energy . Why ?

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The energy required to remove first electron from the outermost orbit or shell of a neutral gaseous atom is called first ionization energy `(IE _(1))`
The energy required to remove an electron from uni-positive ion is called the `2^(nd) ` ionization energy `(E _(2))`.
The second ionization energy `(IE _(2))` is greater than the first ionization energy `(IE _(1 ))` . On removing an electron from an atom . the uni - postitive ion formed will have more effective nuclear charge than the neutral atom . This decreases the repulsion between the electrons and at the sametime increases teh nuclear attraction on the electron in the outer shells . As a result , more energy is required to remove an electron from the uni - positive ion . Hence the second ionization energy is greater than the first ionization energy .
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Knowledge Check

  • Second ioniation energy is higher than first ionisation energy for an element. This is because

    A
    Nuclear charge is high in cation
    B
    Size of cation is higher than neutral atom
    C
    Effective nuclear charge is more for cation
    D
    Bond energy changes with charge

  • Ionization energy is not depending on

    A
    Nuclear charge
    B
    Shelding effect
    C
    Atomic radius
    D
    none

  • The first ionization energy of Lithium will be

    A
    Greater than Be
    B
    Less than Be
    C
    Equal to that of Na
    D
    Equal to that of F

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    What is meant by second ionization energy ?

    The first ionization energy of Lithium will be

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