Across
- 3. anything with mass and volume
- 4. Two or more atoms that act as one
- 5. thing that is made of two or more elements The center of an atom's nucleus
- 6. a substance with one type of atom
- 7. atom's with more/less neutrons
- 11. A mixture that is evenly mixed
- 13. the building block of matter
- 14. a negatively charged particle
Down
- 1. a positively charged particle
- 2. a mixture that isn't evenly mixed
- 8. matter that is always the same
- 9. atom's that gained/lost electrons
- 10. The center of an atom
- 12. the place that has electrons