Lanthanoide contraction and its consequences

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

(a) What is lanthanoid contraction and write its consequences ? (b) Draw the structure of dichromate ion.

Define lanthanoid contraction. Write two consequences of it.

What is lanthanide contraction? What are its consequences?

Lanthanoide contraction is due to

What is lanthanoid contraction ? What are consequeces of lanthanoid contraction ?

Lanthanoid contraction implies