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Lanthanoide contraction and its conseque...

Lanthanoide contraction and its consequences

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Knowledge Check

  • Lanthanoid contraction means :

    A
    small atomic sizes of lanthanoid elements
    B
    small ionic size of lanthanoid ions.
    C
    smaller atomic size of lanthanoids as compared to transition element in the same period
    D
    decrease in atomic and ionic radii of the element of lanthanoid series in moving from left to the right.

  • Lanthanoide contraction affects on

    A
    basicity of lanthanoide hydroxides
    B
    atomic and ions radii of post lanthanoide
    C
    similarty in properties of `2 ^(nd) and 3 ^(rd)` row transition elements
    D
    all of these

  • Lanthanoid contraction is due to:

    A
    Negligible screening effect of 4f orbitals
    B
    Negligible screening effect of 5f orbital
    C
    Decreasing nuclear charge
    D
    Increasing screening effect

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