|A ____ particle is a high-speed electron emitted by nuclei.
|Nuclei ____ during nuclear fission reactions.
|Tritium (two neutrons) is ____ than deuterium (one neutron).
|An ____ particle consists of two protons and two neutrons.
|A ____ ray is a photon emitted by a radioactive substance.
|C-14 is a natural isotope used for ____ dating.
|Nuclei ____ during nuclear fusion reactions.
|All carbon isotopes (e.g. C-12 and C-14) have ____ protons.