Actinoid contraction is greater from element to element than lant… - Vidyadip

Question

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

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Answer

This is due to poor shielding by 5 f -electrons in the actinoids than that by $4 \mathrm{f} \mathrm{e}^{-1} \mathrm{~s}$ in lanthanoids.

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