Question

lactanoid contraction
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Answer 1

Cause of lanthanoid contraction: When one moves from 58Ce to 71Lu along the lanthanide series nuclear charge goes on increasing by one unit every time. Simultaneously an electron is also added which enters to the inner f subshell. The shielding effect of f-orbitals in very poor due to their diffused shape.

Answer 2

Answer:

Do you mean Lanthanide?

Then your answer below! ⬇️⬇️

The Lanthanide Contraction is caused by a poor shielding effect of the 4f electrons. Gd because as atomic number increases, the atomic radius decreases. Yb because it has a larger atomic number. ... This greater nuclear charge has a greater pull on the electrons.

Explanation:

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