Across
- 3. particle with a positive charge
- 5. description using numbers
- 6. reacts chemically
- 7. negatively charged particle
- 9. particle with a neutral charge
Down
- 1. anything that takes up space
- 2. ability to pass along heat, electricity
- 4. the amount of matter of an object
- 5. description using only words
- 8. smallest unit of an element