NEETChemistryD and F Block ElementsMCQ+4 / −1
The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No.65) are
- A[Xe]4f65d16s2,
[Xe]4f75d16s2 and [Xe]4f85d16s2 - B[Xe]4f7 6s2, [Xe]4f7 5d1 6s2 and [Xe]4f9 6s2
- C[Xe]4f7 6s2, [Xe]4f8 6s2 and [Xe]4f8 5d1 6s2
- D[Xe]4f6 5d1 6s2, [Xe]4f7 5d1 6s2 and [Xe]4f9 6s2
View written solutionFree
Correct answer: B
Eu (63) = [Xe] 4f7 6s2
Gd (64) = [Xe] 4f7 5d1 6s2
Tb (65) = [Xe] 4f9 6s2
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