|Nuclei ____ during nuclear fusion reactions.
|Nuclei ____ during nuclear fission reactions.
|C-12 is a stable isotope, whereas C-14 is a ____ isotope.
|Carbon-14 has 6 protons and ____ neutrons.
|All helium isotopes have ____ protons.
|A ____ counter is used to detect ionizing radiation.
|A ____ ray is a photon emitted by a radioactive substance.
|A ____ particle is a high-speed electron emitted by nuclei.