The spin-only magnetic moment value of M3+ ion (in gaseous state) from the pairs Cr3+/Cr2+, Mn3+/Mn2+, Fe3+/Fe2+ and Co3+/Co2+ that has negative standard electrode potential, is________ B.M [Nearest integer]

In given electrodes, only ECr3+/Cr2+0 is negative Cr (24) – [Ar] 4s13d54p0 Number of unpaired electrons = 3 μ = n ( n + 2 ) B M = 3 ( 3 + 2 ) B M = 3 . 9 7 B M ≈ θ 4 B M

The spin-only magnetic moment value of M³+ ion (in gaseous state) from the pairs Cr³⁺/Cr²⁺, Mn³⁺/Mn²⁺, Fe³⁺/Fe²⁺ and Co³⁺/Co²⁺ that has negative standard electrode potential, is________ B.M [Nearest integer]

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Payal Gupta | Contributor-Level 10

6 months ago

In given electrodes, only $E_{C r^{3 +} / C r^{2 +}}^{0}$ is negative

Cr (24) – [Ar] 4s¹3d⁵4p⁰

Number of unpaired electrons = 3

$μ = \sqrt[]{n (n + 2)} B M = \sqrt[]{3 (3 + 2)} B M = 3.97 B M \approx θ 4 B M$

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