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The f-block elements of the periodic tab...

The `f`-block elements of the periodic table contains those element in which

A

Only `4f` orbitals are progressively filled in 6th period.

B

only `5f` orbtials are progressively filled in 7th period.

C

`4f` and `5f` orbitals are progressively filled in 6th and 7th periods respectively.

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
Electronic configuration of `f`-block element `(n - 2) f^(1-14)`,
`(n - 1) d^(10) , ns^(2) f`-block starts with 6th period `(n = 6)`.
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Knowledge Check

  • The f-block of the periodic table contains those elements in which :

    A
    Only `4f` orbitals are progressively filled in 6th period.
    B
    Only `5f` orbitals are progressively filled in 7th period.
    C
    4f and 5f orbitals are progressively filled in 6th and 7th periods respectively.
    D
    None

  • The f-block of the periodic table contains those elements in which :

    A
    Only `4f` orbitals are progressively filled in 6th period.
    B
    Only `5f` orbitals are progressively filled in 7th period.
    C
    4f and 5f orbitals are progressively filled in 6th and 7th periods respectively.
    D
    None

  • The s- block elements of the periodic table are those in which the last elctron enters the s-subshell of the____ shell.

    A
    penultimate
    B
    antepenultimate
    C
    outermost
    D
    foremost
    • A2Z-THE D AND F BLOCK ELEMENTS-Lanthanides And Actinides
    1. The f-block elements of the periodic table contains those element in w...

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    2. Set of continuos atomic number of elements are present in the same gro...

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    3. Across the lanthanide series, the basicity of the lanthanoid hydroxide...

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    4. The radius of La^(+) (at no 57) is 1.06Å. What may be the radius of Lu...

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    5. Misch metal is

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    6. + 4 ion of which has half-filled 4f subshell?

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    7. The main reason for larger number of oxidation state exhibited by the ...

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    8. An alloy of lanthanides

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    9. The lanthanide contraction is responsible for the fact that

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    10. Across the lanthanide series, the basicity of the lanthanoid hydroxide...

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    11. Lanthanides and actinides resemble in

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    12. Lanthanides contraction cause.

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    13. The speration of lanthanides by ion exchanges method is based on

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    14. The radiocative lanthanide is

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    15. Complete the following reaction

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    16. The pair of lanthanides with the highest third ionization energy is

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    17. All actinods have high desities except

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    18. Which one of the following is an electronic configuration of thorium?

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    19. Consider the following statement, (I) The size of the lanthanide M^(...

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    20. The actinoids exhibit, more member of oxidation states in general than...

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