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प्रश्न
Actinoid contraction is greater from element to element than the lanthanoid contraction, why?
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उत्तर
- Actinoid contraction is greater from element to element than lanthanoid contraction. The 5f orbitals in Actinoids have a very poorer shielding effect than 4f orbitals in lanthanoids.
- Thus, the effective nuclear charge experienced by electrons in valence shells in the case of actinoids is much more than that experienced by lanthanoids.
- In actinoids, electrons are shielded by 5d, 4f, 4d and 3d whereas in lanthanoids, electrons are shielded by 4d, 4f only.
- Hence, the size contraction in actinoids is greater as compared to that in lanthanoids.
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संबंधित प्रश्न
Write the general outer electronic configuration of f- block elements.
Which of the following lanthanoid ions is diamagnetic?
Which of the following oxidation states is most common among the lanthanoids?
The most common oxidation state of actinoids is ____________.
Which one of the following is not correct?
What are inner transition elements?
Justify the position of lanthanides and actinides in the periodic table.
Out of Lu(OH)3 and La(OH)3 which is more basic and why?
The elements in which electrons are progressively filled in 4f-orbital are called ______.
Illustrate by taking examples of transition elements and non-transition elements that oxidation states of elements are largely based on electronic configuration.
