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प्रश्न
Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.
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उत्तर
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).
संबंधित प्रश्न
How would you account for the following:
Actinoid contraction is greater than lanthanoid contraction.
Why do actinoids show a wide range of oxidation states?
With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids
Write four points of distinction between Lanthanoids and Actinoids.
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?
Which of the following actinoids shows +6 oxidation state?
The actinoid contraction is attributed to the ____________.
The number of unpaired f-electrons in ytterbium (Z = 70) is ____________.
Which among the following actinoids exhibits highest oxidation state +7?
Which of the following properties is NOT of actinoids?
The inner transition metals of 5f series are known as ____________.
Which of the following actinoids show oxidation states upto +7?
(i) Am
(ii) Pu
(iii) U
(iv) Np
Why do actinoids show variable oxidation states?
What are actinoids? Give their general electronic configuration.
