|A ____ counter is used to detect ionizing radiation.
|All helium isotopes have ____ protons.
|Tritium (two neutrons) is ____ than deuterium (one neutron).
|A ____ particle is a high-speed electron emitted by nuclei.
|Carbon-14 is used to date organic ____ samples.
|All carbon isotopes (e.g. C-12 and C-14) have ____ protons.
|A ____ ray is a photon emitted by a radioactive substance.
|Carbon-14 has 6 protons and ____ neutrons.