Question

The valency of noble gases is zero.
A. True
B. False

Answer 1

Hint: We know the basic tendency of elements to accept electrons to form stable bonds with other elements in order to achieve a higher stable form. Noble gases are called noble because they are unreactive towards other elements and generally don’t form any compounds. Use this concept to derive your answer.

Complete answer:
We know that valency of an element is defined as its tendency to accept valence electrons.
Since noble gas has completely filled valence (outer) shells, they have the least reactivity.
In other words, the noble gases are already stable in their elemental form and thus don't have the need to gain or lose electrons. So its valency is zero.

So, the answer is True.

Note: Valency is defined as the number of electrons in the outermost shell of an element. The noble gases are the gases that don't react with any other element as they have a complete octet. Noble gases are the most stable elements on earth. Since the tendency of noble gases to lose or gain electrons is zero. Their valency is also considered to be 0.