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(C) Chromium $(Cr)$ has an atomic number of $24$. Its expected electronic configuration is $[Ar] 3d^4 4s^2$. However,due to the extra stability of hal

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$Cr$

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(C) Chromium $(Cr)$ has an atomic number of $24$. Its expected electronic configuration is $[Ar] 3d^4 4s^2$. However,due to the extra stability of half-filled $d$-orbitals,the observed electronic configuration is $[Ar] 3d^5 4s^1$. In this configuration,there are $5$ unpaired electrons in the $3d$ subshell and $1$ unpaired electron in the $4s$ orbital. Therefore,the total number of unpaired electrons is $5 + 1 = 6$.

Identify the element from the following having six unpaired electrons in its observed electronic configuration.

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