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nucleon
subject			fact

nucleon	has spin 1/2
	is a part of nucleus
	has mass 939 MeV
	has definition The generic name for the proton and the neutron.
	is a kind of baryon
	is a kind of charge multiplet
baryon	has number of quarks 3
charge multiplet	has lifetime -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press
fermion	has quantum behavior Fermi-Dirac statistics
	obeys exclusion principle
particle	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
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 nucleon :

• neutron (14 facts) - Particle in the nucleus of all atoms except hydrogen. Through beta decay, a neutron may become a proton and an electron; the process occurs in reverse during the formation of a neutron star., One of the constituents of the atomic nucleus discovered in 1932. It is bound into atomic nuclei by the strong nuclear force. Free neutrons decay slowly via the weak nuclear force. Despite being electrically neutral, the neutron possesses both an electric dipole moment (as if it were made of positive and negative charges separated a minute distance) and a magnetic moment, indicating some internal substructure., A neutral baryon., A nuclear particle with a mass slightly greater than that of a proton. A free neutron decays, after a half-life of about 10.6 minutes, into a proton, an electron, and an antineutrino. The neutron is probably made up of still more fundamental particles having both positive and negative charges. The charges balance to give a net charge of zero, but the motions of the charges are such that their magnetic contributions do not cancel and consequently the neutron is magnetic., typically found in the nucleus of an atom., Stable within the nucleus, the neutron if isolated decays, with a ha half-life of fifteen minutes.
• 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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