The complex ions of Zn²⁺ are all colorless. The most likely explanation for this is that A) Zn²⁺ exhibits "d orbital" splittings in its complexes such that they absorb all wavelengths in the visible region. B) because Zn²⁺ is a d¹⁰ ion, it does not absorb visible light even though the "d orbital" splittings are correct for absorbing visible wavelengths. C) Zn²⁺ is paramagnetic. D) Zn²⁺ is not a transition metal ion. E) None of these explanations could be correct.

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Quizplus · Accepted Answer

Zn^2+ is a d^10 ion, meaning its d orbitals are fully filled. This configuration does not allow for d-d transitions that would absorb visible light, making its complexes colorless.

The Complex Ions of Zn2+ Are All Colorless

The Complex Ions of Zn²⁺ Are All Colorless