Home
Class 12
CHEMISTRY
Actinoid contraction is greater from ele...

Actinoid contraction is greater from element to element than lanthanoid contraction. why?

Text Solution

Verified by Experts

The decrease in atomic radli in actinoid elements is greater than lanthanoid contraction because 5felectrons have poor shielding effect as compared to 4f electrons. Therefore, the effect of increased nuclear charge leading to contraction in size is more in case of actinoid elements.
Promotional Banner

Topper's Solved these Questions

  • D - BLOCK ELEMENTS

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE - 1(SHORT ANSWER QUESTIONS)|4 Videos

  • D - BLOCK ELEMENTS

    AAKASH SERIES|Exercise SUBJECTIVE EXERCISE - 1 (VERY SHORT ANSWER QUESTIONS)|4 Videos

  • D & F BLOCK ELEMENTS

    AAKASH SERIES|Exercise PRACTICE SHEET-5 (INTEGER ANSWER TYPE QUESTIONS)|6 Videos

  • D-BLOCK ELEMENTS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS )|69 Videos

Similar Questions

Explore conceptually related problems

What is Lanthanoid contraction ?

Lanthanoid contraction implies

What is actinoid contraction ?

What is lanthanoid contraction ? What are the consequences of lanthanoid contraction?

Because of lanthanoid contraction, which of the folliwng pairs of elements have nearly same atomic radii ? (Numbers in the paren thesis are atomic numbers)

(A): Elements of second and third transition series have nearly same atomic radii (R): Lanthanide contraction is observed in the elements from atomic number 58 to 71.

which block elements are called Lanthanoids / actinoids ?

Why carbon is versatile element in nature?

Second ionization energy of an element is higher than its first ionization energy . Why ?

AAKASH SERIES-D - BLOCK ELEMENTS-PRACTICE EXERCISE
  1. Actinoid contraction is greater from element to element than lanthanoi...

    Text Solution

    |

  2. Which of the following element has high density

    Text Solution

    |

  3. Element with pseudooctet configuration in its outermost shell

    Text Solution

    |

  4. The atomic number of element having pseudo inert gas configuration in ...

    Text Solution

    |

  5. Which of the following ion has three unpaired d-electrons

    Text Solution

    |

  6. Number of electrons present in the outer most shell of Cut ion

    Text Solution

    |

  7. Highest oxidation state exhibited by a 3d-metal is

    Text Solution

    |

  8. The highest oxidation state is exhibited by the transition metal with ...

    Text Solution

    |

  9. Hydrated Cu^(2+) ions absorb light of ..... colour and transmit light ...

    Text Solution

    |

  10. The colour of [Ti(H(2)O)(6)]^(3+) is due to

    Text Solution

    |

  11. Complementary colour of green light of wavelength 5000 A^(@) is

    Text Solution

    |

  12. A transitional metal X^(+2) in its hydrated state has six 3d electrons...

    Text Solution

    |

  13. Magnetic moment of which of the following is zero

    Text Solution

    |

  14. The magnetic moment of an ion in its +3 oxidation state is 3.85 BM. Th...

    Text Solution

    |

  15. Common oxidation states of copper in its compounds are

    Text Solution

    |

  16. The ion with highest magnetic moment is

    Text Solution

    |

  17. The highest degree of paramagnetism is shown by

    Text Solution

    |

  18. M^(x+) ion has magnetic moment 2.84 BM. Then 'x' is (Z of M = 23)

    Text Solution

    |

  19. Magnetic moment of Mn^(+2) is 5.8 B.M. Hence the number of unpaired el...

    Text Solution

    |

  20. Reagent used to reduce NO(3)^(-) to NH(3)

    Text Solution

    |

  21. The common metal present in German Silver, Bell metal and Brass is

    Text Solution

    |