Question

1. Fill in the blank spaces by choosing the correct words from the list given below:

List: motion, space, mass, molecule, elements, atom, shape, changes, cohesion, rigid, hard, adhesion, intermolecular

(iv) _________ is defined as the smallest unit of matter.

Answer 1

• A molecule is defined as the smallest unit of matter, which has an independent existence and can retain the complete physical and chemical properties of matter.
• Even when two or more atoms of the same kind combine they can form a molecule.
• For example, one molecule of hydrogen consists of two atoms of hydrogen.
• Therefore, a molecule is defined as the smallest unit of matter.