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Account for the following. (i) +3 oxi...

Account for the following.
(i) +3 oxidation state of lanthanides is the most stable.
(ii) A few 4f elements show +2 or +4 oxidation states in addition to the characteristic oxidation state of +3.
(iii) Lanthanides are grouped together.

Answer

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Knowledge Check

  • Which of the following lanthanoids show + 2 oxidation state besides the characteristic oxidation state + 3 of lanthanoids -

    A
    Ce
    B
    Eu
    C
    Yb
    D
    Ho

  • Which of the following exhibits only + 3 oxidation state -

    A
    Th
    B
    Ac
    C
    Pa
    D
    U

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    Although +3 oxidation state is the characteristic oxidation state of lanthanoids but cerium shows +4 oxidation state also. Why ?

    Which transition element show highest oxidation state

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