About 240,000 results
Open links in new tab
  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 - Wikipedia

    Subatomic particles are either "elementary", i.e. not made of multiple other particles, or "composite" and made of more than one elementary particle bound together.

  3. Structure of the Atom: Understanding Subatomic Particles

    The proton, the neutron, and the electron are the three so-called subatomic particles. The proton and neutron are each approximately 1000 times more massive than the electron.

  4. Subatomic Particles You Should Know - ThoughtCo

    May 5, 2025 · Learn about the 3 main types of subatomic particles and their properties, as well as other important subatomic particles in chemistry and physics.

  5. What is an Atom? - International Atomic Energy Agency

    Jan 5, 2026 · This subatomic particle (the hydrogen nucleus) was later renamed the proton. (Infographic: M. Magnaye) Rutherford’s discovery led to the development of the first particle …

  6. 2.3: Atoms and Subatomic Particles - Chemistry LibreTexts

    Contrary to what Dalton and his contemporaries believed, atoms can, in fact, be broken apart into smaller units called subatomic particles. Ultimately, three main types of subatomic particles …

  7. Subatomic Particles Explained: Definition, Examples, Practice

    Subatomic particles, which are the building blocks of atoms, include protons, neutrons, and electrons. Each type of particle has a distinct charge and relative mass.

  8. Subatomic Particles Definition - Intro to Chemistry Key Term

    Subatomic particles are the fundamental constituents of matter and energy, and their interactions govern the behavior of all physical phenomena. The three main subatomic particles are …

  9. Subatomic Particles - Science Notes and Projects

    Jan 6, 2024 · Atoms consist of three subatomic particles: protons, neutrons, and electrons. Each atom has a nucleus that contains protons and neutrons and has a positive electrical charge.

  10. Subatomic Particles: The Building Blocks Of Atoms

    Jan 23, 2025 · Atoms, the fundamental building blocks of matter, are composed of three primary subatomic particles: protons, neutrons, and electrons. Protons and neutrons reside within the …