Why do why is actinoid contraction greater than lanthanoid contraction?
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Actinoid contraction is greater from element to element than lanthanoid contraction. ... These 5f orbitals have a poorer shielding effect than 4f orbitals (in lanthanoids). Thus, the effective nuclear charge experienced by electrons in valence shells in case of actinoids is much morethat that experienced by lanthanoids.
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