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JEE Main 20244 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
4 April
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2024 · 4 April · Evening Shift · Chemistry · d and f Block Elements

A first row transition metal in its +2 oxidation state has a...

A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of (3.86 \mathrm{BM}). The atomic number of the metal is

Options

  1. A26
  2. B25
  3. C23
  4. D22

Correct answer

C. 23

Step-by-step solution

22Ti+2⇒[Ar]3 d223 V+2⇒[Ar]3 d325Mn+2⇒[Ar]3 d526Fe+2⇒[Ar]3 d6\begin{aligned} & { }_{22} \mathrm{Ti}^{+2} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^2 \\ & { }_{23} \mathrm{~V}^{+2} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^3 \\ & { }_{25} \mathrm{Mn}^{+2} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^5 \\ & { }_{26} \mathrm{Fe}^{+2} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^6\end{aligned}
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