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  1. Molecule - Wikipedia

    A molecule may be homonuclear, that is, it consists of atoms of one chemical element, e.g. two atoms in the oxygen molecule (O 2); or it may be heteronuclear, a chemical compound …

  2. Molecule | Definition, Examples, Structures, & Facts | Britannica

    Nov 15, 2025 · Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties …

  3. What Is a Molecule? Definition and Examples

    Sep 12, 2020 · A molecule is defined as an electrically neutral group of two or more atoms connected by chemical bonds. Here are examples of molecules and a look at the difference …

  4. Definition and Examples of a Molecule - ThoughtCo

    Sep 3, 2024 · A molecule is two or more atoms that form chemical bonds with each other, representing the smallest unit of a chemical compound with all the physical and chemical …

  5. What Are Molecules? A Definition for Beginners - Biology Insights

    Aug 25, 2025 · A molecule is formed when two or more atoms bond together, representing the smallest identifiable unit of a pure substance that still retains its unique composition and …

  6. MOLECULE Definition & Meaning - Merriam-Webster

    The meaning of MOLECULE is the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms. How to use molecule in a sentence.

  7. Molecule: Definition, Examples, Facts & Diagram

    Feb 2, 2023 · What is a molecule in chemistry. Learn how it is formed. Also, learn about molecular compounds and formulas with examples, facts, and diagrams.

  8. Molecules - Chemistry Encyclopedia - structure, water, examples, …

    A molecule is the smallest entity of a pure compound that retains its characteristic chemical properties, and consequently has constant mass and atomic composition.

  9. What Is a Molecule? A Breakdown of Its Concept, Structure, and …

    Jul 9, 2025 · A molecule is best described as a stable aggregation of atoms bonded together, often electrically neutral, representing the smallest unit of a substance that retains its chemical …

  10. What is a Molecule? - Chemistry Overview (Video)

    Nov 28, 2025 · When atoms share electrons, they form covalent bonds; the resulting collection of bonded atoms is what we call a molecule. Just like an atom is the smallest unit of an element, …