State the reason for the stability of the Gd^ | vedclass

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(B) The atomic number of Gadolinium $(Gd)$ is $64$.Its electronic configuration is $[Xe] 4f^7 5d^1 6s^2$.When $Gd^{3+}$ is formed,it loses three elect

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$4f$ orbital is half-filled.

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(B) The atomic number of Gadolinium $(Gd)$ is $64$.Its electronic configuration is $[Xe] 4f^7 5d^1 6s^2$.When $Gd^{3+}$ is formed,it loses three electrons ($2$ from $6s$ and $1$ from $5d$),resulting in the configuration $[Xe] 4f^7$.The $4f^7$ configuration represents a half-filled $f$-subshell,which provides extra stability due to exchange energy and symmetry.

State the reason for the stability of the $Gd^{3+}$ ion.

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