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What is lanthanoid contraction? What are...

What is lanthanoid contraction? What are the consequences of lanthanold contraction?

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(a) What is lanthanoid contraction? What is the cause of lanthanoid contraction? (b) Explain whether Cu^(2+) is paramagnetic or diamagnetic.

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Knowledge Check

  • Because of lanthanoid contraction :

    A
    separation of the elements is possible
    B
    there is a very small difference in the atomic size of the transition metals of 5th and 6th period and present in the same group.
    C
    there is a gradual decrease in the basic strengths of the hydroxides of lanthanoids
    D
    All are correct.

  • 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.

  • Reason of lanthanoid contraction is

    A
    Decreasing screening effect
    B
    Negligible screening effect of 'f' orbitals
    C
    Increasing nuclear charge
    D
    Decreasing nuclear charge

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