Across
- 3. What type of radiation carries a negative charge?
- 5. what are particles called when they are in the nucleus?
- 6. What type of radiation carries a positive charge?
- 7. Dividing the mass of a nucleus by the number of nucleons in the nucleus gives the ____ __ _____.
- 9. What type of radiation carries no charge?
- 10. Results from radioactive decay, which is the process in which unstable atomic nuclei transform and emit radiation.
Down
- 1. dating is used for plants and animals.
- 2. a mass large enough to sustain fission.
- 4. The shorter the half-life of a substance, the _______ (faster/shorter) it disintegrates and the more active it is.
- 8. The presence of ________ helps hold the nucleus together.