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Questions
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
Chemistry of actinoids is complicated as compared to lanthanoids. Give two reasons.
Why is the chemistry of actinoids complicated as compared to lanthanoids?
Solution 1
The energy difference between the 6d, 7s and 5f orbitals is very small in actinoids. In addition, the 5f orbitals of the actinoids are less shielded than the 4f orbitals of the lanthanoids. Thus, in the lanthanoids, only 4f electrons of Ce participate in chemical bonding, whereas in the lighter actinoids, up to americium, the 5f electrons also take part. This makes the chemistry of actinoids more complicated than that of lanthanoids
Solution 2
The reasons are as follows:
- Actinoids display a large number of oxidation states, while lanthanoids primarily show only three oxidation states.
- Actinoids are radioactive in nature.
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RELATED QUESTIONS
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
Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.
What is the position of actinoids in periodic table ?
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The chemistry of actinoids elements is not so smooth as that of the lanthanoids.
Which of the following actinoids exhibits only + 3 oxidation state?
Identify the CORRECT statement.
Which among the following elements is radioactive?
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Why do actinoids show variable oxidation states?
