The electronic configuration of Gd2+ is (at. No. of Gd is 64)
[Xe] 4f8
[Xe] 4f7
[Xe] 4f7 5d1 6s2
[Xe] 4f7 5d1
Gd2+−[Xe]4f7 5d1
The electronic configuration of gadolinium (Atomic number 64) is (a) [Xe]4f35d56s2 (b) [Xe]4f75d26s1 (c) [Xe]4f75d16s2 (d) [Xe]4f85d66s2
The electronic configuration of Eu 3+ ion is: