Particle Zoo

The Standard Model

© Webprojects | Imprint & Privacy
Images of Elements | Chemical Calculators | Atomic Collider | Teilchenzoo

The Neutron

Symbol: n
Group: fermion, hadron, baryon
Rest mass: 1.009 u
Diameter: 1.5 x 10-15 m
Charge: 0
Mean lifetime: 14.77 min (free)
Spin: 1/2
Free neutrons are radioactive and decay to protons and electrons, if they can't stick to other atoms before. Bound in an atomic nucleus, they are often stable. The amount of neutrons determines, of which isotope an atom of an element is and has a crucial influence on the stability of this isotope. A neutron consists of one up and two down quarks, which are kept together by gluons.



Atom Dark Energy Baryons Mesons Proton Neutron Other Baryons Pion Kaon D-Meson Other Mesons Hadrons Up-Quark Down-Quark Strange-Quark Charm-Quark Bottom-Quark Top-Quark Quarks Leptons Electron Muon Tauon Fermions Neutrinos Electron-Neutrino Muon-Neutrino Tauon-Neutrino Antimatter Dark Matter Gauge Bosons Photon Gluon W-Boson Z-Boson Graviton Higgs-Boson Bosons