Home
Class 12
CHEMISTRY
Which of the following factors may be re...

Which of the following factors may be regarded as the main cause of lanthanide contraction?

A

Greater shielding of `5d` electrons by `4f` electrons.

B

Poorer shielding of `5d` electron by `4f` electrons.

C

Effective shielding of one of `4f` electrons by another in the sub-shell.

D

Poor shielding of one of `4f` electron by another in the sub-shell

Text Solution

Verified by Experts

The correct Answer is:
D
Lanthanide contraction is due to poor shielding of one of `4f` electron by another in the sub-shell.
Promotional Banner

Topper's Solved these Questions

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise Exercise-3|1 Videos

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise Advanced Level Problems|107 Videos

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise Exercise-2|1 Videos

  • P-BLOCK ELEMENTS (HALOGEN & NOBLE GASES)

    RESONANCE|Exercise APSP PART-3|22 Videos

  • QUALITATIVE ANALYSIS

    RESONANCE|Exercise INORGANIC CHMISTRY(Qualitative analysis)|35 Videos

Similar Questions

Explore conceptually related problems

Which of the following factor may be regarded as the main cause of lanthanide contraction?

Which of the following factors may be regarded as the main cause the lanthanide contraction ?

Reason of lanthanide contraction is

Which of the following may be regarded as weak electrolytes?

RESONANCE-PERIODIC TABLE & PERIODICITY-Exercise
  1. The set representing the correct order of the first ionisation potenti...

    Text Solution

    |

  2. Identify the least stable ion amongst the following:

    Text Solution

    |

  3. Assertion (A) : Pb^(+4) compounds are stronger oxidiising agents than...

    Text Solution

    |

  4. Among the following , the number of elements showing only one non-zero...

    Text Solution

    |

  5. Which one of the following ions has the highest value of ionic radius?

    Text Solution

    |

  6. The formation of the oxide ion O((g))^(2-) requires first an exothermi...

    Text Solution

    |

  7. In which of the following arrangements has order is NOT according to t...

    Text Solution

    |

  8. Which of the following factors may be regarded as the main cause of la...

    Text Solution

    |

  9. The lanthanide contraction is responsible for the fact that

    Text Solution

    |

  10. The increasing order of the first ionization enthalpies of the element...

    Text Solution

    |

  11. Lanthanoid contraction is caused due to:

    Text Solution

    |

  12. The stability of dihaiides of Si, Ge, Sn and Pb increases steadlly in ...

    Text Solution

    |

  13. The set representing the correct order of ionic radius is : a)Na^(+) g...

    Text Solution

    |

  14. The correct sequence which shows decreasing order of the ionic radii o...

    Text Solution

    |

  15. The outer electronic configuration of Gd (At.No. 64) is

    Text Solution

    |

  16. the correct order of electron gain enthalpy with negative sign of F,Cl...

    Text Solution

    |

  17. The increasing order of the ionic radii of the given isoelectronic spe...

    Text Solution

    |

  18. Which of the following represents the correct order of increasing firs...

    Text Solution

    |

  19. The first ionisation potential of Na is 5.1eV. The value of eectrons g...

    Text Solution

    |

  20. The ionic radii of N^(3-), O^(2-) and F^(-) are respectively given by:

    Text Solution

    |