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29-01-2024
Chemistry

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Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii?
1) Scandium (21) and Titanium (22)
2) Yttrium (39) and Zirconium (40)
3) Lanthanum (57) and Cerium (58)
4) Hafnium (72) and Tantalum (73)

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