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Question
What is actinoid contraction?
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Solution
The general trend in lanthanoids is observable in the actinoids as well. There is a gradual decrease in the size of atoms or M3+ ions across the series. This may be referred to as the actinoid contraction.
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RELATED QUESTIONS
Distinguish between lanthanoid and actinoids.
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
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
Which of the following actinoids shows +6 oxidation state?
The highest oxidation state in plutonium (At. no. = 94) is ______.
There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
Which of the following actinoids show oxidation states upto +7?
(i) Am
(ii) Pu
(iii) U
(iv) Np
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.
Why do actinoids show variable oxidation states?
