(C) The electronic configuration of $Cr$ $(Z=24)$ is $[Ar] 3d^5 4s^1$. To form $Cr^{3+}$,we remove three electrons (one from $4s$ and two from $3d$).

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(C) The electronic configuration of $Cr$ $(Z=24)$ is $[Ar] 3d^5 4s^1$. To form $Cr^{3+}$,we remove three electrons (one from $4s$ and two from $3d$). Thus,the configuration of $Cr^{3+}$ is $[Ar] 3d^3$. Therefore,the number of $d$-electrons is $3$.

Class 12 Chemistry d-and f-Block Elements General Characteristics

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The number of $d$-electrons in $Cr^{3+}$ ion $(Z=24)$ is

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A
$6$
B
$4$
C
$3$
D
$8$

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d-and f-Block Elements

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General Characteristics

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The number of $d$-electrons in $Cr^{3+}$ ion $(Z=24)$ is

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Which of the following is $NOT$ a physical or chemical characteristic of interstitial compounds?

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