Question

The valency of Calcium is

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The Correct Option is B

To solve the problem, we need to determine the valency of Calcium (Ca).

1. Understanding Valency:
The valency of an element is the number of electrons an atom of the element can donate or accept to form a bond.

2. Determining the Valency of Calcium:
Calcium (Ca) is an alkaline earth metal with an atomic number of 20. Its electron configuration is:
\[ \text{Ca: } 2, 8, 8, 2 \] Calcium has 2 electrons in its outermost shell, and it readily loses these 2 electrons to achieve a stable electron configuration, similar to the nearest noble gas (Argon). Therefore, the valency of Calcium is 2.

Final Answer:
The correct answer is option (B): 2.