Question

Potassium and Calcium belongs to

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

Answer 1

The Correct Option is A

To solve the problem, we need to identify which block of the periodic table Potassium (K) and Calcium (Ca) belong to.

1. Understanding the Periodic Table Blocks:
Elements are categorized into blocks based on the type of atomic orbital that is being filled:

• s-block: Groups 1 and 2 (alkali and alkaline earth metals)
• p-block: Groups 13 to 18
• d-block: Transition elements (Groups 3 to 12)
• f-block: Lanthanides and Actinides

2. Locating Potassium and Calcium:
- Potassium (K) has atomic number 19 and is in Group 1 → s-block
- Calcium (Ca) has atomic number 20 and is in Group 2 → s-block

Final Answer:
Potassium and Calcium belong to the s-block elements (Option A).