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 only
• C. The chemistry of various lanthanoids are very similar
• D. 4f and 5f orbitals are equally shielded

Answer 1

The correct option is D 4f and 5f orbitals are equally shielded

4f orbital is an inner orbital and 5f orbital is an outer orbital so both are not equally shielded.