Question

Valency can be defined as the same number of hydrogen atoms or double the number of oxygen atoms that element combines with.

• A. True
• B. False

Answer 1

The correct option is A True

Valency:

• “Valency is the combining capacity of an atom.”
• “The electrons present in the outermost shell of an atom are known as the valence electrons.”

“Valency can be defined as the same number of hydrogen atoms or double the number of oxygen atoms that an element combines with”. This statement is true. Let's consider this with an example:

• One atom of Hydrogen binds with one atom of Chlorine to form a Hydrochloric $\left(\mathrm{HCl}\right)$acid molecule. In this case, the valency of both the atoms is $1$.
• On the other hand, the valency of Oxygen is $2$. When two atoms of hydrogen bind with one atom of oxygen, a water$\left({\mathrm{H}}_2\mathrm{O}\right)$ molecule is formed.

Therefore, the given statement is true.