What is the magnetic moment of Fe3+ ion?

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Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: D and F Block Elements

Question:

What is the magnetic moment of Fe³⁺ ion?

Options:

\(\sqrt{24}\) B.M.

\(\sqrt{8}\) B.M.

\(\sqrt{35}\) B.M.

Can't be predicted

Correct Answer:

\(\sqrt{35}\) B.M.

Explanation:

₂₆Fe: [Ar]4s²3d⁶

Fe³⁺: [Ar]3d⁵

Magnetic moment, u = \(\sqrt{n(n+2)}\)

u = \(\sqrt{5(5+2)}\) = \(\sqrt{35}\) B.M.