A molecule is the smallest particle of matter.
Explanation for the answer: When two or more atom of the same or different types of elements combine together it is called as Molecule.
Molecules are the smallest particle of any matter.
Molecules of elements i.e., Helium (He), Argon (Ag), etc. are made up of only one atom of that elements.
Molecules of elements like oxygen are made up of two atoms of oxygen i.e., Oxygen (O2)
Therefore, the given statement is true.