COMEDK · Chemistry · 2. Structure of Atom
The spin only magnetic moment of \(\mathrm{Ni}^{2+}(\) in \(\mathrm{BM})\) in aqueous solution will be
- A \(1.73\)
- B \(2.84\)
- C \(3.42\)
- D \(2.25\)
Answer & Solution
Correct Answer
(B) \(2.84\)
Step-by-step Solution
Detailed explanation
Electronic configuration of \(\mathrm{Ni}=[\mathrm{Ar}] 3 d^{8} 4 s^{2}\) \(\therefore\) Number of unpaired electrons \(=2\) \[ \begin{aligned} \therefore \text { Magnetic moment }(\mu) &=\sqrt{n(n+2)} \\ &=\sqrt{2(2+2)}=\sqrt{8}=2.84 . \end{aligned} \]
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