Final answer:
The most basic unit of a compound can be represented by an atom.
Step-by-step explanation:
The most basic unit of a compound can be represented by an atom. An atom is the smallest unit of an element that can still retain the chemical properties of that element. It is composed of a nucleus (containing protons and neutrons) surrounded by electrons in energy levels. When atoms of different elements combine, they form a compound.
Learn more about Basic units of compounds