Question

15. Give one word for the following.

ii. The smallest part of a substance that can exist independently in nature.

Answer 1

• A molecule is the smallest part of an element or a compound that can exist independently.
• Examples of molecules are Hydrogen $\left({\mathrm{H}}_2\right)$, Carbon dioxide $\left({\mathrm{CO}}_2\right)$ etc.

Hence, the smallest part of a substance that can exist independently in nature is called a molecule.