Question

Identify the incorrect statement among the following.

• A. The 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. All of the above statements are incorrect.

Answer 1

The correct option is A The d-block elements show irregular and erratic chemical properties among themselves.

The elements of the d-block show regular and similar chemical properties among themselves due to their similar configuration.
$La$ and $Lu$ have partially filled d orbitals and no other partially filled orbitals, as the configuration of $La$ is $\left[Xe\right]5d^{1}6s^2$ and configuration of $Lu$ is $\left[Xe\right]4f^{14}5d^{1}6s^2$. Besides, the chemistry of various lanthanides is very similar.

Hence, the statement in option A is incorrect.