Answer:
The answer is Molecule.
Step-by-step explanation:
A molecule is an electrically neutral and stable group of at least two atoms in a defined configuration, joined by strong chemical bonds (covalent or ionic bond).
A molecule can consist of several atoms of a single chemical element, as in the case of diatomic oxygen (O₂), or of different elements, as in the case of water (H₂O).
The macromolecules or polymers are constituted by the repetition of a unit and that reach relatively high molecular weights.