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Question
Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.
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Solution
Chemical reactivity - In the lanthanide series, the earlier members of the series are more reactive. They have reactivity that is comparable to Ca. With an increase in the atomic number, the lanthanides start behaving similar to Al. Actinoids, on the other hand, are highly reactive metals, especially when they are finely divided. When they are added to boiling water, they give a mixture of oxide and hydride. Actinoids combine with most of the non-metals at moderate temperatures. Alkalies have no action on these actinoids. In case of acids, they are slightly affected by nitric acid (because of the formation of a protective oxide layer).
RELATED QUESTIONS
Distinguish between lanthanoid and actinoids.
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
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Actinoids show irregularities in their electronic configurations.
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Actinoid contraction is greater than lanthanoid contraction.
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 oxidation states
How do you prepare:
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The inner transition metals of 5f series are known as ____________.
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(i) Am
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