Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryStructure of Atom

Which of the following pairs of transition metal ions has the same spin-only magnetic moment?

Options

  1. ACr ²⁺ and Fe ³⁺
  2. BV ³⁺ and Ni ²⁺
  3. CMn ²⁺ and Co ²⁺
  4. DTi ²⁺ and V ²⁺

Correct answer

B. V ³⁺ and Ni ²⁺

Step-by-step solution

The spin-only magnetic moment depends on the number of unpaired electrons ( n ) according to the formula = n(n+2) B.M. Ions with the same number of unpaired electrons will exhibit the same spin-only magnetic moment. Let us write the electronic configurations to determine n for each ion: Cr ²⁺ : [ Ar ] 3d^4 ( n=4 ) and Fe ³⁺ : [ Ar ] 3d^5 ( n=5 ) V ³⁺ : [ Ar ] 3d^2 ( n=2 ) and Ni ²⁺ : [ Ar ] 3d^8 ( n=2 ) Mn ²⁺ : [ Ar ] 3d^5 ( n=5 ) and Co ²⁺ : [ Ar ] 3d^7 ( n=3 ) Ti ²⁺ : [ Ar ] 3d^2 ( n=2 ) and V ²⁺ : [ Ar ] 3d^3 (

Practice Structure of Atom on Quantrex Academy →

More from Structure of Atom

Identify the pair of atoms of elements as isotones from the following. 2026Which of the following elements has an electronic configuration, [ Ar ] 4s^2 ? 2026Calculate the energy per mole of photons of red light with a wavelength 750 nm. [ h = 6.626 10⁻³⁴ Js, C = 3 10^8 m/s.] 2026Calculate the energy associated with an electron in the first orbit of hydrogen atom? 2026Find the wave number of the 4^ th line in the Lyman series of H spectrum. (R = Rydberg constant) 2026Calculate the de-Broglie wavelength of an electron having velocity 1000 ms ⁻¹ [ h = 6.626 10⁻³⁴ js , mass of an electron = 9.1 10⁻³¹ kg ] 2026How many total number of s and p electrons are respectively present in Cl ^- ? 2026Visible light has a wavelength of 700 nm. Calculate its frequency in hertz. 2026 Full Structure of Atom list All NEET PYQs