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Though a transition element, scandium (Z...

Though a transition element, scandium (Z = 21) does not exhibit variable oxidation state.

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**Step-by-Step Text Solution:** 1. **Understanding Transition Elements**: Transition elements are defined as d-block elements that have partially filled d-orbitals in at least one of their oxidation states. They typically exhibit variable oxidation states due to the involvement of d-electrons in bonding. 2. **Identifying Scandium**: Scandium (Sc) has an atomic number of 21. Its electron configuration is [Ar] 3d¹ 4s². In its ground state, scandium has one electron in the 3d subshell and two electrons in the 4s subshell. 3. **Oxidation States of Scandium**: The most common oxidation state of scandium is +3. This occurs when scandium loses its two 4s electrons and one 3d electron, resulting in the configuration [Ar] 3d⁰. Scandium does not exhibit other oxidation states like many other transition metals do. ...
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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.

Which transition element does not exhibit variable oxidation state?

Knowledge Check

  • Oxygen exhibits positive oxidation state in

    A
    CO
    B
    `F_2O`
    C
    `NO`
    D
    `N_2O`

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