Answer:
At the core, elements are pure substances composed of only one type of atom.
Step-by-step explanation:
Atoms are the fundamental units of matter, consisting of a nucleus (protons and neutrons) surrounded by electrons. Molecules are formed when two or more atoms chemically bond, creating a distinct compound. Compounds are composed of different elements. In summary, elements are basic substances of single atoms, atoms are the building blocks of matter, molecules result from bonded atoms, and compounds involve various elements in a specific arrangement.