Across
- 4. subtract the mass number from the atomic number
- 6. half the life of an element
- 7. powerhouse of the cell
- 11. emission of radiation
- 13. helps treat cancer
Down
- 1. nucleus is come into contact with and splits
- 2. two nuclei combine and form a larger nuclei
- 3. total number of protons and neutrons
- 5. blocked by aluminum
- 8. sequence of reactions
- 9. same as the atomic number
- 10. blocked by skin
- 12. same as the number of electrons
- 14. element with an altered number of electrons