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प्रश्न
Give reasons for the following:
The chemistry of actinoids elements is not so smooth as that of the lanthanoids.
उत्तर
Lanthanoids primarily show three oxidation states (+2, +3, +4). Among these oxidation states, +3 state is the most common. Lanthanoids display a limited number of oxidation states because the energy difference between 4f, 5d, and 6s orbitals is quite large. On the other hand, the energy difference between 5f, 6d, and 7s orbitals is very less.
Hence, actinoids display a large number of oxidation states. For example, uranium and plutonium display +3, +4, +5, and +6 oxidation states while neptunium displays +3, +4, +5, and +7. The most common oxidation state in the case of actinoids is also +3.
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संबंधित प्रश्न
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
Give a reason for the following:
Actinoids show irregularities in their electronic configurations.
Write one similarity and one difference between the chemistry of lanthanoid and actinoid elements.
What is the position of actinoids in periodic table ?
Which of the following actinoids exhibits only + 3 oxidation state?
Actinoid series begins at ____________ and ends at ____________.
The actinoid contraction is attributed to the ____________.
Which of the following actinoids show oxidation states upto +7?
(i) Am
(ii) Pu
(iii) U
(iv) Np
What causes actinoid contraction?
Why do actinoids show variable oxidation states?
