Question

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Q. Acitonoid contraction is greater from element to element than lanthanoid contraction.why?⬅️anyone answer plz .


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Answer 1

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As the effective nuclear charge experienced is high, the electrons are attracted with much force, hence the size of the atom decreases. Hence, actinoid contraction is greater from element to element than lanthanoid contraction.

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Answer 2

Answer:

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 more that than experienced by lanthanoids.

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