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Which one of the following ions has elec...

Which one of the following ions has electronic configuration `[Ar]3d^(6)` ? `(At. Nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)`

A

`Co^(3+)`

B

`Ni^(3+)`

C

`Mn^(3+)`

D

`Fe^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
A
`Co (Z = 27) : 3d^(7) 4s^(2) , Co^(3+) (Z = 27) : 3d^(6)`
`Ni (Z = 28) : 3d^(8) 4s^(2) , Ni^(3+) (Z = 27) : 3d^(7)`
`Mn (Z = 25) : 3d^(5) 4s^(2) , Mn^(3+) (Z = 27) : 3d^(4)`
`Fe (Z = 26) : 3d^(6) 4s^(2) , Fe^(3+) (Z = 26) : 3d^(5)`
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Which of the following is the stable electron configuration of Fe^(+3) ion

Bessemer converter is used for Atomic nos, Mn = 25, Fe = 26, Co = 27, Ni = 28

Knowledge Check

  • Which of the following ions has electronic configuration [Ar] 3d^6

    A
    `Ni^(3+)`
    B
    `Mn^(3+)`
    C
    `Fe^(3+)`
    D
    `Co^(3+)`

  • Which of the following ions has d^5 electronic configuration?

    A
    `Cr^(2+)`
    B
    `Co^(3+)`
    C
    `Mn^(3+)`
    D
    `Fe^(3+)`

  • Which of the following ions has d^(5) electronic configureation ?

    A
    `Cr ^(2+)`
    B
    `Co^(3+)`
    C
    `Mn^(3+)`
    D
    `Fe^(3+)`

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    Which of the following species is expected ot show the highest magnetic moment? (At.Nos.: Cr = 24, Mn = 25, Co = 27, Ni = 28, Cu = 29 )

    Which of the following transition metal ion has maximum unpaired electrons ? (At. no. Mn = 25, Fe= 26, Ni = 28, Cu= 29)

    The d-electron configurations of Cr^(2+) , Mn^(2+), Fe^(2+) and Co^(2+) are d^4 , d^5 , d^6 and d^7 respectively . Which one of the following will exhibit the lowest paramagnetic behaviour ? (Atomic no. Cr=24 , Mn=25 , Fe= 26, Co=27)

    What is the atomic number of the element with M^(2+) ion having electronic configuration [Ar] 3d^(8) ?

    The d-electron configuration of Cr^(2+), Mn^(2+) , Fe^(2+) , Co^(2+) , are d^4 , d^5, d^6 and d^7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour ? (At. No. Cr=24 , Mn=25 , Fe=26, Co=27)

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