Across
- 3. amount of protons in an atom
- 5. the amount of space something takes up
- 7. atoms loosely packed with a set volume
- 9. a positively charged atom
Down
- 1. a neutrally charged atom
- 2. atoms loosely packed with no set volume
- 4. how much something weighs
- 6. a negatively charged atom
- 8. atoms packed tightly together with a set volume