Definition that contains atomic nucleus
- neutron an elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus
- rutherford British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)
- meson an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0
- hydrogen ion a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
- mesotron an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0
- pair formation the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus
- ernest rutherford British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)
- mass number the sum of the number of neutrons and protons in an atomic nucleus
- magic number the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126
- pair production the transformation of a gamma-ray photon into an electron and a positron when the photon passes close to an atomic nucleus