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 it forms a $Gd^{3+}$ ion,it loses thre

Vedclass · Accepted Answer

$4f-$ 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 it forms a $Gd^{3+}$ ion,it loses three electrons,resulting in the configuration $[Xe] 4f^7$. Since the $4f$ subshell has $7$ orbitals,a $4f^7$ configuration represents a half-filled 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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