Question

difference between lanthanoid and actinoid contraction ??​

Answer 1

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➡️➡️Lanthanoid Contraction: The steady decrease in the atomic and ionic radii of the transition metals as the atomic number increases.✔✔

➡️➡️Actinoid Contraction: The gradual decrease in the ionic radii with the increase in atomic no. is called actinoid contraction.✔✔

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Answer 2

Answer:

lanthinoid,are 6th period elements and actinoids 7th group.So Lanthinoids have poor 4f sheilding ,whereas actinods 5f sheilding

Explanation:

simmu,see here that actinoids show contraction in ionic sizes where as lanthinoids show decrease in size or atomic radii

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