Yes, an atom is smaller than a molecule. An atom is the basic unit of matter and the smallest unit of an element that retains the properties of that element. Atoms are made up of protons, neutrons, and electrons.
On the other hand, a molecule is formed when two or more atoms bond together. Molecules can be made up of the same type of atoms (like O2, which is two oxygen atoms bonded together) or different types of atoms (like H2O, which is two hydrogen atoms and one oxygen atom bonded together).
Since a molecule consists of multiple atoms, it is naturally larger than a single atom. The size difference can vary depending on the complexity of the molecule, but in general, molecules are larger than individual atoms.