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Which of the 3d series of the transition...

Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why ?

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Manganese (Z = 25) shows maximum number of oxidation states because of its electronic configuration `3d^(5)4s^(2)`. As 3d and 4s are close in energy, it has maximum number of electrons to lose or share (as all the 3d electrons are unpaired). Hence, it shows maximum oxidation states from `+2` to `+7(+2,+3,+4,+5,+6" and "+7)`.
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(a) Define transition elements. Give the general electronic configuration of the transition elements. (b) (i) Name a transition element which does not exhibit variable oxidation state. (ii) Which of the 3d series of transition metals exhibit the largest number of oxidation states? (iii) Give reason why HCl is not used to acidify KMnO_4 solution in volumetric determination of Fe^(2+)

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Knowledge Check

  • Which of the 3d-seres of the transition metals exhibits the leagest number of oxidation states ?

    A
    Cr
    B
    Mn
    C
    Fe
    D
    Co

  • Which one of the following exhibits the largest number of oxidation states?

    A
    `Ti(22)`
    B
    `V(23)`
    C
    `Cr(24)`
    D
    `Mn(25)`

  • The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds

    A
    `3d^54s^2`
    B
    `3d^84s^2`
    C
    `3d^74s^2`
    D
    `3d^64s^2`

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