Question

does the model show an atom, molecule, or compound? *
he
helium
he
atom
molecule
compound

Explanation:

An atom is the smallest unit of an element. Helium (He) is an element. A molecule is made up of two or more atoms (either of the same or different elements). A compound is a substance formed when two or more different elements chemically bond together. Since the model shows only one type of element (Helium) and not a combination of atoms or different elements, it represents an atom.

Answer:

Atom