| Nuclei ____ during nuclear fusion reactions. |
2 |
| C-14 is a natural isotope used for ____ dating. |
6 |
| Uranium-238 is used to date ____ samples (rocks, meteorites). |
8 |
| A ____ ray is a photon emitted by a radioactive substance. |
gamma |
| All carbon isotopes (e.g. C-12 and C-14) have ____ protons. |
geological |
| C-12 is a stable isotope, whereas C-14 is a ____ isotope. |
join together |
| All helium isotopes have ____ protons. |
radioactive |
| Carbon-14 has 6 protons and ____ neutrons. |
radiocarbon |
