What is the number of unpaired electrons in [ | vedclass

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(A) The central metal ion is $Co^{3+}$. The atomic number of $Co$ is $27$. The electronic configuration of $Co$ is $[Ar] 3d^7 4s^2$.For $Co^{3+}$,the

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Zero

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(A) The central metal ion is $Co^{3+}$. The atomic number of $Co$ is $27$. The electronic configuration of $Co$ is $[Ar] 3d^7 4s^2$.For $Co^{3+}$,the configuration is $[Ar] 3d^6$.In the presence of the strong field ligand $NH_3$,the electrons in the $3d$ orbitals pair up.The $3d^6$ configuration becomes $t_{2g}^6 e_g^0$,meaning all six electrons are paired in the $3d$ orbitals.Therefore,the number of unpaired electrons is $0$.

What is the number of unpaired electrons in $[Co(NH_3)_6]^{3+}$ complex?

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