What is lanthanoid contraction?

Which of the following is not related to lanthanoid contraction and its consequences ?

What are the consequences of lanthanoid contraction?

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

Write any one consequence of lanthanoid contraction.

Lanthanoid contraction is a term often associated with the chemistry of transition and inner transition element. Explain the term Lanthanoid constractions. How does it affect the chemistry of Lanthanoid and that of Zr, Hf element.

The lanthanide contraction is responsible for the fac t that

Assertion : The radius of La^(+3)(Z=57) is 1.06Å whereas radius of Lu^(+3)(Z=71) is 1.09Å Reason : Due to Lanthanoid contraction , paramanetism is least with ._(60)Nd : If both Assertion and Reason are true and reason is the correct explanation of Assertion, If both Assertion and Reason are true but reason is not the correct explanation of Assertion, If Assertion is true but Reason is false, If both Assertion and Reason are false

Transition elements are d - block elements and inner transition elements are f-block elements. Write any two consequences of Lanthanoid Contraction.

Lanthanoid contraction is caused due to: