Question

Which among the following elements belongs to second inner transition series?

• A. Sm
• B. Lu
• C. Am
• D. Dy

Hint:

Remember: Lanthanides are the first inner transition series and Actinides are the second inner transition series.

Answer 1

The Correct Option is C

Step 1: Understand the concept of inner transition elements.
Inner transition elements are divided into two series:
First inner transition series – Lanthanides (4f block)
Second inner transition series – Actinides (5f block)
Step 2: Identify the given elements.
Samarium (Sm), Lutetium (Lu), and Dysprosium (Dy) belong to the lanthanide series.
Americium (Am) belongs to the actinide series.
Step 3: Match with the second inner transition series.
Since the second inner transition series corresponds to actinides, Americium is the correct choice.
Step 4: Conclusion.
Americium belongs to the second inner transition series.