The electronic configuration of $Gd^{2+}$ is (at. no. of $Gd$ is $64$)
- A$[Xe] 4f^8$
- B$[Xe] 4f^7$
- C$[Xe] 4f^7 5d^1 6s^2$
- D$[Xe] 4f^7 5d^1$
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[Atomic number of $Gd=64$]
[Atomic number of $Gd=64$]
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