QJEEM21Ch3637: JEE Main 2021 Chemistry - Class 12 JEEM21Ch3637 Solution: What is the spin-only magnetic moment value (BM) of a divalent…

Question

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What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in it's aqueous solution?

Accepted Answer

₂₅Mn = [Ar]3d⁵ 4s²
Mn²⁺ = [Ar]3d⁵ 4s⁰

No. of unpaired electron (n) = 5

\mu = \sqrt {n\left( {n + 2} \right)} \,BM

= \sqrt {5 \times 7} {\rm{ }} = \sqrt {35} {\rm{ }} = {\rm{ }}5.92{\rm{ }}

BM

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