Identify the incorrect statement among the following :

Options

A. d-block elements show irregular and erratic chemical properties among themselves
B. La and Lu have partially filled d orbitals and no other partially filled orbitals
C. The chemistry of various lanthanoids is very similar
D. 4f and 5f orbitals are equally shielded

Answer

D

Explanation

4f and 5f belongs to different energy levels, hence the shielding effect on them is not the same.
Shielding of 4f is more than 5f. Hence (d) is correct.