Question

Main group elements are

• A. s-block elements only
• B. p-block elements only
• C. both s- and p-block elements
• D. d-block elements only
• E. 4f and 5f-block elements

Hint:

Main group elements are also called representative elements and include Groups 1, 2 and 13–18.

Answer 1

The Correct Option is C

Concept: Main group elements are those in which the valence electrons occupy s or p orbitals. \[ \text{s-block: Groups 1 and 2} \quad ; \quad \text{p-block: Groups 13 to 18} \]

Step 1: Understand classification.

• s-block $\rightarrow$ Group 1, 2
• p-block $\rightarrow$ Group 13–18
• d-block $\rightarrow$ Transition metals
• f-block $\rightarrow$ Inner transition metals

Step 2: Identify main group elements.
Main group = s-block + p-block