The class of particles that are the fundamental building blocks of matter and energy e.g. electrons, protons and neutrons are elementary particles which are the building blocks of matter.
a particle that is less complex than an atom; regarded as constituents of all matter
a particle that is not composed of other particles
a particle with no measurable internal structure, that is, it is not a composite of other particles
a quantum of matter or energy that has no known structure or spatial extent and that is subject to one or more of the fundamental forces according to its fundamental properties
A particle that, it is believed, cannot be subdivided.
A particle which is not made up of smaller particles. The neutron and proton are both made up of smaller particles— called quarks. On the other hand, quarks are not believed to be made of anything smaller. Like quarks, electrons and photons are also believed to be elementary particles.
One of the basic particles of matter. The most familiar of the elementary particles are the proton, neutron, and electron.
A basic building block of atoms, of which the most prominent examples are photons, electrons, and quarks.
Originally a term applied to any particle that could not be further subdivided; now applied only to protons, electrons, neutrons, antiparticles and strange particles, but not to alpha particles and deuterons.
In particle physics, an elementary particle or fundamental particle is a not known to have substructure; that is, it is not known to be made up of smaller particles. If an elementary particle truly has no substructure, then it is one of the basic particles of the universe from which all larger particles are made. In the modern theory of particle physics, the Standard Model, the quarks, leptons, and gauge bosons are elementary particles.
