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Reason of lanthanoid contraction is...

Reason of lanthanoid contraction is

A

Decreasing screening effect

B

Negligible screening effect of 'f' orbitals

C

Increasing nuclear charge

D

Decreasing nuclear charge

Text Solution

Verified by Experts

The correct Answer is:
B
Negligible screening effect of .f. orbital is responsible for lanthanoid contraction
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Knowledge Check

  • Reason of lanthanide contraction is

    A
    negligble sereening effect of f-orbital
    B
    increasing unuclear charge
    C
    decreasing nuclear charge
    D
    decreasing screening effect

  • 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.

  • 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.

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