Question

The valency of an element belonging to VA group of the modern periodic table is

• A. 5
• B. 3
• C. 7
• D. 1

Answer 1

The Correct Option is C

Correct answer: 3 

Explanation:
Elements in the VA group (Group 15) of the modern periodic table have 5 valence electrons in their outermost shell. To achieve a stable octet configuration, they typically gain 3 electrons. 

Hence, their common valency is:
Valency = 8 - number of valence electrons = 8 - 5 = 3 
So, the valency of Group VA elements like nitrogen, phosphorus, arsenic, etc., is usually 3.