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प्रश्न
Compare the chemistry of actinoids with that of the lanthanoids with special reference to oxidation state.
उत्तर
Lanthanoids show limited oxidation states (+2, +3, +4) in which the +3 oxidation state is the most common. This is because of the large energy gap between the 4f, 5d and 6s sub-shells. On the other hand, actinoids show a large number of oxidation states because the energy gap between 5f, 6d and 7s sub-shells is less.
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संबंधित प्रश्न
What are chemical twins? Write ‘two’ examples.
Account for the following :
Zr and Hf have almost similar atomic radii.
Name a member of the lanthanoid series which is well known to exhibit +4 oxidation state.
What are the different oxidation states exhibited by the lanthanoids?
Compare the chemistry of actinoids with that of the lanthanoids with special reference to chemical reactivity.
The chemistry of the actinoid elements is not so smooth as that of the Lanthanoids. Justify this statement by giving some examples from the oxidation state of these elements.
Name the members of the lanthanoid series which exhibit +4 oxidation state and those which exhibit +2 oxidation state. Try to correlate this type of behavior with the electronic configurations of these elements.
Write the different oxidation states of iron
What is lanthanoid contraction?
Explain effects of lanthanoid contraction
Explain the cause of Lanthanoids contraction.
Name an element of lanthanoid series which is well knwon to shown +4 oxidation state. Is it a strong oxidising agent or reducing agent?
What is the action of the following on lanthanoids?
a. water
b. Sulphur, heat
c. nitrogen, heat
Although Zr belongs to 4d and Hf belongs to 5d transition series but it is quite difficult to separate them. Why?
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of ______.
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of _______.
Write any two consequences of Lanthanoid Contraction.
State a reason for the following:
La(OH)3 is more basic than Lu(OH)3.
