Which of the follwing is the correct electronic configuration of ${F e}^{+ 3} i o n (Z_{F e} = 26)$ ?

[A r] 3 d^{6}

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[A r] 3 d^{5}

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[A r] 3 d^{6} 4 s^{2}

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[A r] 3 d^{6} 4 s^{1}

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Solution

The correct option is D $[A r] 3 d^{5}$
The electronic configuration of Fe is $[A r] 3 d^{6}$ $4 s^{2}$
In $F e^{2 +}$ Fe looses electron in $4 s^{2}$ and for $F e^{3 +}$ the electron will be lost from $3 d^{6}$
And hence electronic configuration of $F e^{3 +}$ is $[A r] 3 d^{5}$

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Which of the follwing is the correct electronic configuration of Fe+3ion(ZFe=26)?

The correct option is D [Ar]3d5The electronic configuration of Fe is [Ar]3d6 4s2In Fe2+ Fe looses electron in 4s2 and for Fe3+ the electron will be lost from 3d6And hence electronic configuration of Fe3+ is [Ar]3d5

Which of the follwing is the correct electronic configuration of ${F e}^{+ 3} i o n (Z_{F e} = 26)$ ?

The correct option is D $[A r] 3 d^{5}$
The electronic configuration of Fe is $[A r] 3 d^{6}$ $4 s^{2}$
In $F e^{2 +}$ Fe looses electron in $4 s^{2}$ and for $F e^{3 +}$ the electron will be lost from $3 d^{6}$
And hence electronic configuration of $F e^{3 +}$ is $[A r] 3 d^{5}$