Which specific pair of elements exhibits nearly identical atomic radii, rendering them exceptionally difficult to separate, primarily due to the phenomenon of lanthanide contraction?
University of Ilorin CHM102 2025A past question
- Zirconium (Zr) and Hafnium (Hf)
- Zirconium (Zr) and Tantalum (Ta)
- Zirconium (Zr) and Niobium (Nb)
- Zirconium (Zr) and Actinium (Ac)
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