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The element scandium (Z=21) does not exh...

The element scandium (Z=21) does not exhibit variable oxidation state and yet it is regarded as a transition element. Explain.

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The electronic configuration of Sc (Z=21)`,[Ar]^(18)4s^92)3d^(1)`. The element exhibits +3 oxidation state in its compounds because by losing the three electrons, it acquires a noble gas configuration. However, it is still regarded as a transition elemetn because it has partially filled d-orbitals.
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Explore conceptually related problems

Give reasons for the following: (a) Transition metals and many of their compounds act as catalysts. (b) Scandium (Z = 21) does not exhibit variable oxidation state and yet it is regarded as a transition element. (c) Write the step involved in the preparation of Na_2CrO_4 from chromite ore.

Assign reasons for the following : (i) The enthalpies of atomisation of transition elements are high. (ii) The transition metals and many of their compounds act as good catalyst. (iii) From element to element the actinoid contraction is greater than the lanthanoid contraction. (iv) The E^(@) value for the Mn^(3+)//Mn^(2+) couple is much more positive than that for Cr^(3+)//Cr^(2+) . (v) Scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as transition element.

Knowledge Check

  • Fluorine does not exhibit variable oxidation states due to

    A
    its high electronegativity
    B
    smallest size of its atom
    C
    low bond dissociation energy
    D
    non availability of vacant d-orbitals.

  • Which transition element does not exhibit variable oxidation state?

    A
    Sc
    B
    Cu
    C
    Zn
    D
    Hg

  • Which element does not show variable oxidation state ?

    A
    Sc
    B
    V
    C
    Fe
    D
    Hg

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    Scandium forms no coloured ionis, yet it is regarded as a transition elements. Explain why ?

    The element that usucally dose NOT show variable oxidation states is :

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