Home
Class 12
CHEMISTRY
Lanthanoid contraction occurs because...

Lanthanoid contraction occurs because

A

The 4f electrons, which are gradually added, create a strong shielding effect

B

The 4f orbitals are greater in size than the 3d and 3f orbitals

C

The 5f orbitals strongly penetrate into the 4f orbitals

D

The poor shielding effect of 4f electrons is coupled with increased attraction between the nucleus and the added electrons.

Text Solution

Verified by Experts

The correct Answer is:
D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THE D-AND F-BLOCK ELEMENTS

    PHYSICS WALLAH|Exercise Level-2|42 Videos

  • THE D-AND F-BLOCK ELEMENTS

    PHYSICS WALLAH|Exercise NEET Past 5 Years Questions|14 Videos

  • SURFACE CHEMISTRY

    PHYSICS WALLAH|Exercise NEET PAST 5 YEARS QUESTIONS|8 Videos

  • THE P-BLOCK ELEMENTS

    PHYSICS WALLAH|Exercise NEET Past 5 Years Questions|28 Videos

Similar Questions

Explore conceptually related problems

Lanthanoide contraction is due to

(a) What is Lanthanoid contraction? Give the cause of lanthanoid contraction. (b) Why do transition metals form many coloured ions?

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.

  • Lanthanoid contraction is caused due to

    A
    Atomic number
    B
    Size of 4f orbitals
    C
    Effective nuclear charge
    D
    Poor shielding effect of 4f electrons

  • Lanthanoid contraction is caused due to:

    A
    The imperfect shielding on outer electrons by 4f -electrons from the nuclear charge
    B
    The aapreciable shielding on outer electrons by 4f-electrons from the nuclear charge
    C
    The aapreciable shielding on outer electrons by 5d-electrons from the nuclear charge
    D
    The same effective nuclear charge from Ce to Lu

    • Similar Questions

    Explore conceptually related problems

    Lanthanoide contraction and its consequences

    The Lanthanoid contraction is responsible for the fact that

    Lanthanoid contraction is due to:

    Actinoid contraction is more than lanthanoid contraction because

    lanthanoid contraction is caused due to:

    Home
    Profile