Across
- 4. the atom that undergoes radioactive decay in a nuclear reaction; the original element
- 5. a high-speed electron or positron emitted in the decay of a radioactive isotope
- 7. The process by which two or more small nuclei fuse to make a bigger nucleus, while also releasing huge amounts of energy
- 11. A reaction that involves a change in the nucleus of an atom
- 14. An isotope whose nucleus decays spontaneously, giving off particles and/or energy.
- 17. High-energy, shortwave radiation emitted by the nuclei of radioactive atoms.
- 19. A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
Down
- 1. A nuclear reaction in which a radioactive atom emits an alpha particle consisting of two protons and two neutrons (helium-4).
- 2. nuclear decay that involves the release of gamma radiation
- 3. the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element
- 6. Determined by the ratio of protons to neutrons in the nucleus for an isotope
- 8. The transfer of energy by electromagnetic waves
- 9. Ability of radiation to pass through materials.
- 10. the stable atom that results from the decay of a parent atom; the product of radioactive decay.
- 12. length of time required for half of the radioactive atoms in a sample to decay
- 13. radioactive decay of an atomic nucleus that is accompanied by the emission of a beta particle
- 15. A cluster of 2 protons and 2 neutrons (helium-4) emitted from a nucleus
- 16. Atoms of the same element that have different numbers of neutrons
- 18. The process of determining the age of an object using the half-life of one or more radioactive isotopes.