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Lanthanides and actinides resemble in...

Lanthanides and actinides resemble in

A

Electron configuration

B

Oxidation state

C

Ionisation energy

D

Formation Complexes

Text Solution

Verified by Experts

The correct Answer is:
d
Both resembles in electronic configuration.
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Lanthanoids and actinides resemble in :

The Lanthanides and Actinides are placed in group number :

Knowledge Check

  • Lanthandies and actinides are

    A
    s-block elements
    B
    p-block elements
    C
    d-block elements
    D
    f-block elements

  • Lanthanides are

    A
    14 elements in the `7^(th)` period filling 4f orbitals
    B
    14 elements in the `5^(th)` period filling 5t orbitals
    C
    14 element in the `5^(th)` period filling 5t orbitals
    D
    14 elements in the `4^(th)` period that are filling 4f orbitals

  • Lanthanides are

    A
    14 elements in the sixth period (At.no=90 to 103) that are filling 4f sub-level
    B
    14 elements in the seventh period (At.no.=90 to 103) that are filling 5f sub-level
    C
    14 elements in the sixth period (At.no.=58 to 171) that are filling 4f sub-level).
    D
    14 elements in the seventh period (At. No.=58 to 71) that are filling 4f sub-level

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    What were the main demeris of mendeleev's periodic table? (i)Hydrogen has been places in group I though it resembles to group VII as well (ii)Position of some elements was not justified (iii)Isotopes were not given separate places. (iv)Lanthanides and actinides were not included in the table.

    Lanthanides and actinides are also called as

    The lanthanides and actinides are collectively known as_________.

    The f-block elements are those in which the differentiating electron enters the (n-2)f orbital. There are two series of f-block elements corresponding to filling of 4f and 5f-orbitals called lanthanides and actinides respectively. They show different oxidation states depending upon the stability of f^0, f^7 and f^14 configurations, though the principal oxidation state is +3. There is a regular decrease in size of lanthanide ions with increase in atomic number and it is known as lanthanide contraction. As a result of this, the basic character of oxides and hydroxides decreases from first element (La) to last element (Lu). All the actinides are radioactive and therefore, it is difficult to study their chemical nature. Which of the following statements is not true ?

    The f-block elements are those in which the differentiating electron enters the (n-2)f orbital. There are two series of f-block elements corresponding to filling of 4f and 5f-orbitals called lanthanides and actinides respectively. They show different oxidation states depending upon the stability of f^0, f^7 and f^14 configurations, though the principal oxidation state is +3. There is a regular decrease in size of lanthanide ions with increase in atomic number and it is known as lanthanide contraction. As a result of this, the basic character of oxides and hydroxides decreases from first element (La) to last element (Lu). All the actinides are radioactive and therefore, it is difficult to study their chemical nature. The atomic numbers of three lanthanide elements X,Y and Z are 65,68 and 70 respectively. The basic character of their hydroxides will decrease as

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