Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
d and f Block Elements

NEET 2015 · Chemistry · d and f Block Elements

Gadolinium belongs of 4f series. Its atomic number is 64. Which of...

Gadolinium belongs of 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

Options

  1. A[Xe]4f86d2\left[Xe\right]4{f}^{8}6{d}^{2}
  2. B[Xe]4f95s1\left[Xe\right]4{f}^{9}5{s}^{1}
  3. C[Xe]4f75d16s2\left[Xe\right]4{f}^{7}5{d}^{1}6{s}^{2}
  4. D[Xe]4f65d26s2\left[Xe\right]4{f}^{6}5{d}^{2}6{s}^{2}

Correct answer

C. [Xe]4f75d16s2\left[Xe\right]4{f}^{7}5{d}^{1}6{s}^{2}

Step-by-step solution

64Gd=54[Xe]6s24f75d164Gd = 54\left[Xe\right]6{s}^{2}4{f}^{7}5{d}^{1}
Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Although +3 oxidation state is most common in lanthanoids, cerium still shows +4… NEET 2026The lanthanide ion having four unpaired electrons is (Given : Atomic numbers of Ce =58… NEET 2026The green paramagnetic species formed by heating KMnO _4 at 513 K is NEET 2026The calculated 'spin-only' magnetic moment of Ti^ 2+ \ (3d^2) is : NEET 2026Match List I with List II : List I (Transition metal/compound/complex) List II (Catalytic… NEET 2026Given below are two statements : One is labelled as Assertion A and the other is labelled… NEET 2026Given below are two statements : Statement I : Ferromagnetism is considered as an extreme… NEET 2025Which of the following set of ions act as oxidising agents? NEET 2024 Full d and f Block Elements list All NEET PYQs