Question

Which block elements from following are known as transition elements?

• A. f-block
• B. s-block
• C. p-block
• D. d-block

Hint:

Think of the periodic table layout as a bridge: the central d-block serves as the horizontal transition pathway between the reactive metals on the left and the non-metals on the right, earning them the name transition elements.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
We need to identify which orbital block of the periodic table houses the elements officially classified as transition elements.

Step 2: Detailed Explanation:
The s-block contains Groups 1 and 2 (alkali and alkaline earth metals). The p-block spans Groups 13 through 18 (main-group elements). The f-block consists of the inner transition series (lanthanides and actinides). The d-block occupies Groups 3 to 12 in the central region of the table. These d-block elements possess partially filled d-orbitals and form a characteristic bridge between the highly reactive s-block metals and the more covalent p-block non-metals, earning them the designation transition elements.

Step 3: Final Answer:
Transition elements belong to the d-block, option (D).