Across
- 5. minimum amount of fissionable material to create a chain reaction
- 6. a self-sustaining reaction in which the products of one event stimulate other events
- 8. the time it takes for half the original quantity of an element to decay
- 9. radiation in the form of an electron
Down
- 1. splitting of atoms
- 2. type of radiation that is in the form of a helium atom
- 3. the process in which unstable atomic nuclei transform and emit radiation
- 4. combining atoms
- 7. extremely dangerous radiation