Question

Identify the incorrect statement among the following.

• 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 orbital.
• C. The chemistry of various lanthanoids is very similar.
• D. $4f$ and $5f$ -orbitals are equally shielded.

Answer 1

Answer: (D)

$4f$ and $5f$ -belongs to different shell, experience different amount of shielding.