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Among the given lanthanoid ions, which one exhibits diamagnetic behavior? (Atomic numbers: Ce = 58, Sm = 62, Eu = 63, Yb = 70)

1. Sm2+
2. Eu2+
3. Yb2+
4. Ce2+

Correct answer: Yb2+

Solution

Ytterbium(II) ion exhibits diamagnetic behavior due to its completely filled or empty orbitals, resulting in no unpaired electrons.

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