The 'f' orbitals are half and completely filled, respectively in lanthanide ions [Given…

Chemistry · JEE Main · NTA Exams — d- and f-Block Elements

1. Eu²⁺ and Tm²⁺
2. Sm²⁺ and Tm³⁺
3. Tb⁴⁺ and Yb²⁺
4. Dy³⁺ and Yb³⁺

Answer

(C) Tb 4+ and Yb 2+

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