If an atom has 13 electrons in the M shell an | vedclass

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(D) The electronic configuration of the atom can be determined by filling the shells: $K=2$,$L=8$,$M=13$,$N=1$. Total electrons = $2 + 8 + 13 + 1 = 24

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$6$

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(D) The electronic configuration of the atom can be determined by filling the shells: $K=2$,$L=8$,$M=13$,$N=1$. Total electrons = $2 + 8 + 13 + 1 = 24$. The element with atomic number $24$ is Chromium $(Cr)$. The ground state electronic configuration of $Cr$ $(Z=24)$ is $[Ar] 3d^5 4s^1$. In the $3d$ subshell,there are $5$ orbitals,each containing $1$ electron,and in the $4s$ subshell,there is $1$ electron. All these $6$ electrons are unpaired. Therefore,the number of unpaired electrons is $6$.

If an atom has $13$ electrons in the $M$ shell and $1$ electron in the $N$ shell,then the number of unpaired electrons in that atom will be ............

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