|A ____ particle is a high-speed electron emitted by nuclei.
|An ____ particle consists of two protons and two neutrons.
|Tritium (two neutrons) is ____ than deuterium (one neutron).
|Nuclei ____ during nuclear fission reactions.
|A ____ counter is used to detect ionizing radiation.
|Carbon-14 has 6 protons and ____ neutrons.
|Uranium-238 is used to date ____ samples (rocks, meteorites).
|All helium isotopes have ____ protons.