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

Answers (1)
M manish

Actinoid contraction is greater from element to element than lanthanoid contraction. The reason behind it is the poor shielding effect of  5f (in actinoids) orbitals than 4f orbitals( in lanthanoids). As a result, the effective nuclear charge experienced by valence electrons is more in actinoids than lanthanoids elements.

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