Across
- 4. the time recquired for half the atoms in a sample of a radioactive isotope to decay.
- 5. the combining of nuclei of light atoms to form heavier nuclei
- 8. nuclear fusion brought about by high temperatures.
- 9. radiation consisting of cosmic rays.
- 10. a subatomic particle made up of the combination of two protons and two neutrons ejected by a radioactive nucleus.
Down
- 1. high frequency electromagnetic radiation emitted by radioative nuclei.
- 2. the high energy particles and electromagnetic radiation emitted by a radioactive substance.
- 3. the splitting of the atomi nucleus into two smalled halves.
- 6. radiation around us everyday in the rocks and soil.
- 7. an electron emitted during the radioactive decay of a radioactive nucleus.