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  4. Which of the following graph is correct representation between atomic number (Z) and magnetic moment of d -block elements? [Outer electronic configuration: .(n-1) mathrmd mathrmx mathrmns1 text or 3]

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Q. Which of the following graph is correct representation between atomic number $\left(Z\right)$ and magnetic moment of $d$ -block elements? [Outer electronic configuration : $\left.(n-1) \mathrm{d}^{\mathrm{x}} \mathrm{ns}^{1 \text { or } 3}\right]$

NTA AbhyasNTA Abhyas 2020The d-and f-Block Elements

Solution:

Magnetic moment $=\sqrt{n \left(\right. n + 2 \left.\right)}BM$

$N$ : Number of unpaired $e^{-}$

As atomic number increases in d-block element number of unpaired $e^{-}$ first increases upto middle then decreases.