IGNOU PHE 13 2026 - In which of the following ions do you expect angular momentum quenchin

Question

In which of the following ions do you expect angular momentum quenching and why:

$$\text{Ti}^{3+}, \text{Gd}^{3+}, \text{Ni}^{2+}$

29 Jan 2026

Answer :

Word Count : 265

In solids, especially in crystalline environments, angular momentum quenching refers to the suppression of the orbital angular momentum of electrons due to the interaction of the ion with the surrounding electric field of the lattice. This phenomenon is primarily observed in transition metal ions, particularly those involving 3d electrons. Angular momentum quenching is expected in ions having partially filled 3d orbitals, such as Fe²⁺, Fe³⁺, Co²⁺, Ni²⁺, and Mn²⁺. In these ions, the orbital angular momentum is largely quenched because the 3d

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