The outer electronic configuration of Gd (At | vedclass

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(B) The atomic number of Gadolinium $(Gd)$ is $64$. Its electronic configuration is based on the noble gas Xenon ($Xe$,$Z=54$). The remaining $10$ ele

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$4f^7 \ 5d^1 \ 6s^2$

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(B) The atomic number of Gadolinium $(Gd)$ is $64$. Its electronic configuration is based on the noble gas Xenon ($Xe$,$Z=54$). The remaining $10$ electrons are filled in the $4f$,$5d$,and $6s$ orbitals. According to Hund's rule and the stability of half-filled subshells,the $4f$ subshell prefers to be half-filled $(4f^7)$. Thus,the configuration is $[Xe] \ 4f^7 \ 5d^1 \ 6s^2$.

The outer electronic configuration of $Gd \ (At. \ No. \ 64)$ is

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