Across
- 1. Strongest radiation
- 4. Neutrally charged particles in the nucleus
- 7. an unstable nucleus
- 9. Radioactive decay that subtracts 1
- 13. half of an atoms life
- 14. Same as # of protons
- 16. the average mass of an element
- 17. a radioactive isotope
- 18. # on the periodic table
Down
- 2. The separating of particles in the nucleus
- 3. the equation of a nuclear reaction
- 5. mass of a atom
- 6. Alpha, Beta, Gamma
- 8. same as atomic #
- 10. Makes up all matter
- 11. Radioactive decay that subtracts He
- 12. a stable variation of an element
- 15. a variation of an element