The main factor for the cause of lanthanide contraction is poorer shielding of 5d electrons by 4f electrons.

In lanthanides, Ce changes from +4 to +3 oxidation state.

What is the first element of the fourth transition series in the periodic table?

What type of bond do the transition elements form with themselves?

Which of the following is amphoteric?

Actinoids are mostly attacked by which acid?

Which of the following is not a consequence of lanthanide contraction?

What is the formula of hematite?