Answer:
True. Atoms can be joined together in well-defined molecules.
Step-by-step explanation:
A molecule is a group of atoms held together by chemical bonds. These bonds can be covalent, where atoms share electrons, or ionic, where one atom donates electrons to another. Well-defined molecules have a specific chemical composition and structure, and they can range from simple diatomic molecules like oxygen (O2) to complex organic molecules like glucose (C6H12O6).