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Though copper , silver and gold have com...

Though copper , silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Text Solution

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These metals in their common oxidation states have incompletely filled d-orbitals, e.g., `Cu^(2+)` has `3d^(9)` and `Au^(3+)` has `5d^(8)` configuration.
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Why is Cu (Z = 29) considered a transition metal ?

(a) Account for the following : (i) Mn_(2)O_(7) is acidic whereas MnO is basic. (ii) Though copper has completely filled d-orbital (d^(10)) yet it is considered as a transition metal. (iii) Actinoids show wide range of oxidation states. (b) Write the preparation of potassium permanganate from pyrolusite ore (MnO_(2)) .

Knowledge Check

  • A completely filled d-orbital (d^10) is

    A
    Spherically symmetrical
    B
    has octahedral symmetry
    C
    Has tetrahedral symmetry
    D
    Depends on the atom

  • a completely filled d orbital (d^(10))

    A
    Spherically symmetrical
    B
    Has octahedral symmetrical
    C
    Has octahedral symmetry
    D
    Depends on the atom

  • Which of the following has completely filled d-orbital?

    A
    Sc
    B
    Mn
    C
    Zn
    D
    Cr

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    (i) Give the general electronic configuration of d-block elements, (ii) Silver atom has completely filled d-orbitals (4d^10) in its ground state. Yet, it is considered as transition element. Why? (iii) Cu^+ ion is not stable in aqueous solution. Explain. (iv) Actinoids contraction is greater from element to element than lanthanoid contraction. Why?

    Copper, silver and gold are collectively called as "…............." metals.

    Silver atom has completely filled d orbitals (4d^(10)) in its ground state. How can you say it is a transition element?

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