Across
- 3. Technique which is used to date materials such as rocks or fossils, in which trace radioactive impurities were selectively incorporated when they were formed.
- 6. the changing of one element into another by radioactive decay, nuclear bombardment, or similar processes
- 14. A thermal power station in which the heat source is a nuclear reactor.
- 16. The spontaneous breakdown of an unstable atomic nucleus resulting in the release of energy and matter from the nucleus. Atomic number of the original atom changes.
- 19. Elements with atomic number beyond 92 or Uranium
- 20. Particles and rays emitted by the nucleus of an unstable atom.
- 22. decay An unstable or radioactive atom's nucleus loses one electron (or beta particle) and the atom's atomic number increases by 1.
- 23. radiation The uniform microwave radiation remaining from the Big Bang.
- 24. particle A fast moving electron emitted by the nucleus of an unstable or radioactive atom.
- 25. An apparatus or structure in which nuclear/radioactive material can be made to undergo a controlled, self-sustaining nuclear reaction with the consequent release of energy.
Down
- 1. High penetrating radiation coming from an unstable atomic nucleus.
- 2. A Geiger counter detects nuclear radiation by measuring the emission of ionizing radiation of alpha particles, beta particles and gamma rays.
- 4. A process in which neutrons released in nuclear fission produce an additional nuclear fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats.
- 5. The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- 7. A process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products.
- 8. Atoms of same element with different mass numbers or neutrons.
- 9. particle a helium nucleus emitted by some radioactive substances
- 10. A process in which in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
- 11. process in which an unstable atom emits gamma radiation
- 12. decay An unstable or radioactive atom's nucleus loses two protons and two neutrons (or a nucleus of He atom) and the atom's atomic number decreases by 2 and mass number increases by 4.
- 13. The energy released during nuclear fission or fusion, especially when used to generate electricity.
- 15. Radioactive isotope of a stable element.
- 17. Building blocks of protons and neutrons.
- 18. Time in which half of the initial mass of a radioactive element turns into another element.
- 21. A radioactive element or compound added to material to monitor the material's distribution as it progresses through a system.