QJEEM21Ch81a9: JEE Main 2021 Chemistry - Class 11 JEEM21Ch81a9 Solution: The spin-only magnetic moment value of B 2 + species is…

Question

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The spin-only magnetic moment value of

B_{2}^{+}

species is _____________

\times

10^{$-$ 2} BM. (Nearest integer) [Given :

\sqrt{3}

= 1.73]

Accepted Answer

B_{2}^{+} \Rightarrow σ_{1 s}^{2} σ_{1 s}^{* 2} σ_{2 s}^{2} σ_{2 s}^{* 2} π_{2 p y}^{1} ≃ π_{2 p z}^{0}

It has one unpaired electron.

Spin - only magnetic moment =

μ

=

\sqrt{n (n + 1)}

n = Number of unpaired electrons

= \sqrt{1 (1 + 2)} = \sqrt{3}

BM

= 1.73 BM

= 1.73

\times

10^{$-$ 2} BM

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