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What is lanthanoid contraction? What is ...

What is lanthanoid contraction? What is its cause and what ar its consequences ?

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Knowledge Check

  • lanthanoid contraction is caused due to:

    A
    the appreciable sshielding on outer electrons by 4f electrons from the nuclear charge
    B
    the appreaciable shiedling on outer electrons by 5f electrons from the nuclear charge
    C
    the same effective nuclear charge from Ce to Cu
    D
    the imperfect shielding on outer electrons by 4f electrons from the nuclear charge

  • Lanthanoid contraction is caused due to:

    A
    The imperfect shielding on outer electrons by 4f -electrons from the nuclear charge
    B
    The aapreciable shielding on outer electrons by 4f-electrons from the nuclear charge
    C
    The aapreciable shielding on outer electrons by 5d-electrons from the nuclear charge
    D
    The same effective nuclear charge from Ce to Lu

  • Lanthanoid contraction is caused due to

    A
    Atomic number
    B
    Size of 4f orbitals
    C
    Effective nuclear charge
    D
    Poor shielding effect of 4f electrons

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