JEE MAIN - Chemistry (2007 - No. 21)
Identify the incorrect statement among the following :
d-Block elements show irregular and erratic chemical properties among themselves
La and Lu have partially filled d orbitals and no other partially filled orbitals
The chemistry of various lanthanoids is very similar
4f and 5f orbitals are equally shielded
Forklaring
$$4f$$ orbital is nearer to nucleus as compared to $$5f$$ orbital therefore, shielding of $$4f$$ is more than $$5f.$$