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  1. Subatomic particle | Definition, Examples, & Classes | Britannica

    Dec 12, 2025 · Subatomic particle, any of various self-contained units of matter or energy that are the fundamental constituents of all matter. They include electrons, protons, neutrons, quarks, …

  2. Subatomic particle - Elementary, Quarks, Leptons | Britannica

    Dec 12, 2025 · The term subatomic particle refers both to the true elementary particles, such as quarks and electrons, and to the larger particles that quarks form. Although both are …

  3. Subatomic particle - 4 Forces, Quarks, Leptons | Britannica

    Dec 12, 2025 · Subatomic particle - 4 Forces, Quarks, Leptons: Quarks and leptons are the building blocks of matter, but they require some sort of mortar to bind themselves together into …

  4. Particle physics | Elementary Particles, Quarks & Hadrons | Britannica

    Dec 9, 2025 · Particle physics, Study of the fundamental subatomic particles, including both matter (and antimatter) and the carrier particles of the fundamental interactions as described …

  5. Electron | Definition, Mass, & Facts | Britannica

    Nov 20, 2025 · However, atoms are made up of three types of subatomic particles: the heavy protons and neutrons that make up the nucleus (the central part of the atom), and the much …

  6. Subatomic particle - Quarks, Antiquarks, Gluons | Britannica

    Dec 12, 2025 · Subatomic particle - Quarks, Antiquarks, Gluons: The baryons and mesons are complex subatomic particles built from more-elementary objects, the quarks. Six types of …

  7. The discovery of subatomic particles | Britannica

    subatomic particle, or elementary particle , Any of various self-contained units of matter or energy.

  8. Proton | Definition, Mass, Charge, & Facts | Britannica

    Dec 7, 2025 · Neutrons and protons are classified as hadrons, subatomic particles that are subject to the strong force. Hadrons, in turn, have been shown to possess internal structure in …

  9. Subatomic particle - Electron, Muon, Tau | Britannica

    Oct 15, 2025 · Subatomic particle - Electron, Muon, Tau: Probably the most-familiar subatomic particle is the electron, the component of atoms that makes interatomic bonding and chemical …

  10. Atom | Definition, Structure, History, Examples, Diagram, & Facts ...

    Dec 25, 2025 · Most of the atom is empty space. The rest consists of three basic types of subatomic particles: protons, neutrons, and electrons. The protons and neutrons form the …