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elementary particle
subject			fact

elementary particle	has spin
	has definition A particle considered to be fundamental, i.e. not composite, a particle which cannot be separated into components
	is a kind of particle
particle	obeys uncertainty principle
	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
	has mass
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of elementary particle :

• carrier boson (49 kinds, 180 facts) (force carrier) - A particle that carries one of the fundamental forces between other interacting particles. For example, the carrier boson for the electromagnetic force is the photon., Particle that acts as the transmitters of forces. The best known example is the photon, which transmits electromagnetic forces. The gluons are the transmitters of the strong interactions, and the W⁺, W^-, and Z⁰ particles are the transmitters of the weak interactions. See Table 7.1 on page 120.
• hadron (18 kinds, 103 facts) - High mass elementary particles that are influenced by the strong nuclear force.
• lepton (15 kinds, 84 facts) - A fermion which is not made of quarks., The generic name for any spin-1/2 particle which does not feel the strong nuclear force. The six known leptons are the electron, the muon, the tau lepton, and their respective neutrinos. The name was originally coined to refer to light particles., Any fermion that does not participate in the strong interactions. Leptons include the electron family and the muon family., Elementary particle that does not participate in the strong interactions, including electrons, muons, and neutrinos., Elementary particle that have no measurable size and are not influenced by the strong nuclear force. Electrons, muons, and neutrinos are leptons., A class of non-strongly-interacting particles that includes the electron, muon, tau, and their associated neutrinos. See Table 7.1 on page 120., A fundamental particle of nature, which may interact via all of the fundamental forces except the strong nuclear force. The electron is an example of a lepton., Elementary particle like the electron and neutrino that do not experience the strong nuclear force. Unlike the strongly interacting hadrons, the leptons have small masses.
• parton (12 kinds, 56 facts) - A generic term used to describe any particle which may be present inside nucleons. It includes quarks, antiquarks and gluons., A hypothetical pointlike constituent of a nucleon, which contains all the charge of the nucleon.
• proton (13 facts) (p) - A subatomic particle with positive electric charge. Every atom has at least one proton in its nucleus; the number of protons determines the element. For example, all atoms with one proton are hydrogen, all atoms with two protons are helium, and so on., One of the constituents of the atomic nucleus. It is a spin-1/2 particle carrying positive electric charge. The proton is the lightest baryon and, as a result, is the particle into which all other baryons eventually decay. It is believed to be absolutely stable, but certain theories (GUTs) predict it will decay very, very slowly., A baryon made of two up quarks and a down quark. It possesses a positive electromagnetic charge and can only be found in atomic nuclei. A single proton is a hydrogen nucleus., A massive particle with positive electrical charge found in the nuclei of atoms. Composed of two up quarks and one down quark. The proton's mass is 938.3 MeV, slightly less than that of the neutron., A positively charged elementary particle; the nucleus of a hydrogen atom. Mass of proton 1.00728 amu = 1.6726 × 10^-24 g = 1836.12 m_e.

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