Question

Valency of Noble gases is:

• A. Zero
• B. One
• C. Eight
• D. Two

Answer 1

Answer:

A. Zero

Valency:

• Valency is a measure of the combining power of an atom.
• The valency of an element is determined by the number of electrons in its outermost shell.
• A electrons which present in the outer shell of an atom are known as "valence electrons." We can say that valence is the number of electrons that an element can lose or gain to achieve stability.
• Valency of Noble gases is zero because they have fully filled outermost shells.
• So they have no tendency to gain or lose electrons.