3. What are the consequences of lanthanoid contraction as per The d and f block elements Class 12 pdf download?
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Ans- Because of the lanthanoid contraction, the size of the next elements (Hf – Hg) becomes very similar to the size of the previous row members (Zr – Cd), making them difficult to distinguish. The properties of lanthanoids are essentially same due to minor differences in atomic radii, making separation difficult.
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