Across
- 3. the smallest particle of matter
- 4. the weakest form of radiation
- 8. two or more elements that can be physically separated
- 9. the particle with no charge in an atom
- 10. the positively charged particle in an atom
Down
- 1. a radioactive element
- 2. two or more elements that cannot be physically separated
- 5. the strongest form of radiation
- 6. the medium strength of radiation
- 7. the negatively charged particle in an atom