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प्रश्न
How would you account for the following:
Actinoid contraction is greater than lanthanoid contraction.
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
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उत्तर
In actinoids, 5 f-orbitals are filled. These 5 f-orbitals have a poorer shielding effect than 4 f-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 electrons in valence shells in the case of lanthanoids. Hence, the size contraction in actinoids is greater than that in lanthanoids.
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संबंधित प्रश्न
Distinguish between lanthanoid and actinoids.
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
Write on similarity between the chemistry of lanthanoids and actinoids.
With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids
Compare the chemistry of the actinoids with that of lanthanoids with reference to electronic configuration
Compare the chemistry of the actinoids with that of lanthanoids with reference to oxidation states
Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.
Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
How would you account the following :
Highest fluoride of Mn is MnF4 whereas the highest oxide is Mn2O7.
Choose the most correct option.
In which of the following series all the elements are radioactive in nature?
Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why?
The actinoid contraction is attributed to the ____________.
The electronic configuration of Ux+ ion is [Rn]. What is the value of x?
[At. No. of U = 92]
Which among the following actinoids exhibits highest oxidation state +7?
Which of the following properties is NOT of actinoids?
Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.
What causes actinoid contraction?
Why do actinoids show variable oxidation states?
