Subatomic particle
Subatomic Particle
A Subatomic Particle (/sʌb.əˈtɒm.ɪk ˈpɑːr.tɪ.kəl/) is a particle smaller than an atom: it may be elementary or composite. The term is derived from the Greek words "sub" meaning "under" and "atomos" meaning "indivisible".
Subatomic particles include Electrons, Protons, and Neutrons, which are the composite particles in an atom. There are also more exotic particles such as Quarks, Leptons, and Bosons, which are considered elementary particles.
Etymology
The term "Subatomic Particle" comes from the prefix "sub-" meaning "below" or "under", and "atomic", from the Greek "atomos" meaning "indivisible". This is because these particles are components of atoms, which were once thought to be indivisible.
Related Terms
- Atom: The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.
- Elementary Particle: A particle not known to have substructure; that is, it is not known to be made up of smaller particles.
- Composite Particle: A particle that is made up of smaller particles.
- Quantum Mechanics: The branch of physics dealing with the behavior of subatomic particles.
- Particle Physics: The branch of physics that studies the nature of particles that constitute matter and radiation.
External links
- Medical encyclopedia article on Subatomic particle
- Wikipedia's article - Subatomic particle
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